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* Add module versioningBrian Behlendorf2013-12-066-0/+6
| | | | | | | | | | | | | | | | | | | | | | | Use the standard Linux MODULE_VERSION macro to expose the installed zavl, znvpair, zunicode, zcommon, zfs, and zpios module versions. This will also automatically add a checksum of the .c files and headers in "srcversion". See: /sys/module/zavl/version /sys/module/zavl/srcversion /sys/module/znvpair/version /sys/module/znvpair/srcversion /sys/module/zunicode/version /sys/module/zunicode/srcversion /sys/module/zcommon/version /sys/module/zcommon/srcversion /sys/module/zfs/version /sys/module/zfs/srcversion /sys/module/zpios/version /sys/module/zpios/srcversion Signed-off-by: Brian Behlendorf <[email protected]> Closes #1923
* Illumos #4045 write throttle & i/o scheduler performance workMatthew Ahrens2013-12-0622-652/+1307
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4045 zfs write throttle & i/o scheduler performance work 1. The ZFS i/o scheduler (vdev_queue.c) now divides i/os into 5 classes: sync read, sync write, async read, async write, and scrub/resilver. The scheduler issues a number of concurrent i/os from each class to the device. Once a class has been selected, an i/o is selected from this class using either an elevator algorithem (async, scrub classes) or FIFO (sync classes). The number of concurrent async write i/os is tuned dynamically based on i/o load, to achieve good sync i/o latency when there is not a high load of writes, and good write throughput when there is. See the block comment in vdev_queue.c (reproduced below) for more details. 2. The write throttle (dsl_pool_tempreserve_space() and txg_constrain_throughput()) is rewritten to produce much more consistent delays when under constant load. The new write throttle is based on the amount of dirty data, rather than guesses about future performance of the system. When there is a lot of dirty data, each transaction (e.g. write() syscall) will be delayed by the same small amount. This eliminates the "brick wall of wait" that the old write throttle could hit, causing all transactions to wait several seconds until the next txg opens. One of the keys to the new write throttle is decrementing the amount of dirty data as i/o completes, rather than at the end of spa_sync(). Note that the write throttle is only applied once the i/o scheduler is issuing the maximum number of outstanding async writes. See the block comments in dsl_pool.c and above dmu_tx_delay() (reproduced below) for more details. This diff has several other effects, including: * the commonly-tuned global variable zfs_vdev_max_pending has been removed; use per-class zfs_vdev_*_max_active values or zfs_vdev_max_active instead. * the size of each txg (meaning the amount of dirty data written, and thus the time it takes to write out) is now controlled differently. There is no longer an explicit time goal; the primary determinant is amount of dirty data. Systems that are under light or medium load will now often see that a txg is always syncing, but the impact to performance (e.g. read latency) is minimal. Tune zfs_dirty_data_max and zfs_dirty_data_sync to control this. * zio_taskq_batch_pct = 75 -- Only use 75% of all CPUs for compression, checksum, etc. This improves latency by not allowing these CPU-intensive tasks to consume all CPU (on machines with at least 4 CPU's; the percentage is rounded up). --matt APPENDIX: problems with the current i/o scheduler The current ZFS i/o scheduler (vdev_queue.c) is deadline based. The problem with this is that if there are always i/os pending, then certain classes of i/os can see very long delays. For example, if there are always synchronous reads outstanding, then no async writes will be serviced until they become "past due". One symptom of this situation is that each pass of the txg sync takes at least several seconds (typically 3 seconds). If many i/os become "past due" (their deadline is in the past), then we must service all of these overdue i/os before any new i/os. This happens when we enqueue a batch of async writes for the txg sync, with deadlines 2.5 seconds in the future. If we can't complete all the i/os in 2.5 seconds (e.g. because there were always reads pending), then these i/os will become past due. Now we must service all the "async" writes (which could be hundreds of megabytes) before we service any reads, introducing considerable latency to synchronous i/os (reads or ZIL writes). Notes on porting to ZFS on Linux: - zio_t gained new members io_physdone and io_phys_children. Because object caches in the Linux port call the constructor only once at allocation time, objects may contain residual data when retrieved from the cache. Therefore zio_create() was updated to zero out the two new fields. - vdev_mirror_pending() relied on the depth of the per-vdev pending queue (vq->vq_pending_tree) to select the least-busy leaf vdev to read from. This tree has been replaced by vq->vq_active_tree which is now used for the same purpose. - vdev_queue_init() used the value of zfs_vdev_max_pending to determine the number of vdev I/O buffers to pre-allocate. That global no longer exists, so we instead use the sum of the *_max_active values for each of the five I/O classes described above. - The Illumos implementation of dmu_tx_delay() delays a transaction by sleeping in condition variable embedded in the thread (curthread->t_delay_cv). We do not have an equivalent CV to use in Linux, so this change replaced the delay logic with a wrapper called zfs_sleep_until(). This wrapper could be adopted upstream and in other downstream ports to abstract away operating system-specific delay logic. - These tunables are added as module parameters, and descriptions added to the zfs-module-parameters.5 man page. spa_asize_inflation zfs_deadman_synctime_ms zfs_vdev_max_active zfs_vdev_async_write_active_min_dirty_percent zfs_vdev_async_write_active_max_dirty_percent zfs_vdev_async_read_max_active zfs_vdev_async_read_min_active zfs_vdev_async_write_max_active zfs_vdev_async_write_min_active zfs_vdev_scrub_max_active zfs_vdev_scrub_min_active zfs_vdev_sync_read_max_active zfs_vdev_sync_read_min_active zfs_vdev_sync_write_max_active zfs_vdev_sync_write_min_active zfs_dirty_data_max_percent zfs_delay_min_dirty_percent zfs_dirty_data_max_max_percent zfs_dirty_data_max zfs_dirty_data_max_max zfs_dirty_data_sync zfs_delay_scale The latter four have type unsigned long, whereas they are uint64_t in Illumos. This accommodates Linux's module_param() supported types, but means they may overflow on 32-bit architectures. The values zfs_dirty_data_max and zfs_dirty_data_max_max are the most likely to overflow on 32-bit systems, since they express physical RAM sizes in bytes. In fact, Illumos initializes zfs_dirty_data_max_max to 2^32 which does overflow. To resolve that, this port instead initializes it in arc_init() to 25% of physical RAM, and adds the tunable zfs_dirty_data_max_max_percent to override that percentage. While this solution doesn't completely avoid the overflow issue, it should be a reasonable default for most systems, and the minority of affected systems can work around the issue by overriding the defaults. - Fixed reversed logic in comment above zfs_delay_scale declaration. - Clarified comments in vdev_queue.c regarding when per-queue minimums take effect. - Replaced dmu_tx_write_limit in the dmu_tx kstat file with dmu_tx_dirty_delay and dmu_tx_dirty_over_max. The first counts how many times a transaction has been delayed because the pool dirty data has exceeded zfs_delay_min_dirty_percent. The latter counts how many times the pool dirty data has exceeded zfs_dirty_data_max (which we expect to never happen). - The original patch would have regressed the bug fixed in zfsonlinux/zfs@c418410, which prevented users from setting the zfs_vdev_aggregation_limit tuning larger than SPA_MAXBLOCKSIZE. A similar fix is added to vdev_queue_aggregate(). - In vdev_queue_io_to_issue(), dynamically allocate 'zio_t search' on the heap instead of the stack. In Linux we can't afford such large structures on the stack. Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Ned Bass <[email protected]> Reviewed by: Brendan Gregg <[email protected]> Approved by: Robert Mustacchi <[email protected]> References: http://www.illumos.org/issues/4045 illumos/illumos-gate@69962b5647e4a8b9b14998733b765925381b727e Ported-by: Ned Bass <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1913
* Illumos #4347 ZPL can use dmu_tx_assign(TXG_WAIT)Matthew Ahrens2013-12-063-37/+18
| | | | | | | | | | | | | | | | | | | | | | | | Fix a lock contention issue by allowing threads not holding ZPL locks to block when waiting to assign a transaction. Porting Notes: zfs_putpage() still uses TXG_NOWAIT, unlike the upstream version. This case may be a contention point just like zfs_write(), however it is not safe to block here since it may be called during memory reclaim. Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Boris Protopopov <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4347 illumos/illumos-gate@e722410c49fe67cbf0f639cbcc288bd6cbcf7dd1 Ported-by: Ned Bass <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]>
* Remove incorrect ASSERT in zfs_sb_teardown()Brian Behlendorf2013-12-021-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of zfs_sb_teardown() there is an assertion that all inodes which are part of the zsb->z_all_znodes list have at least one reference on them. This is always true for the standard unmount case but there are two other cases where it is not strictly true. * zfs_ioc_rollback() - This is the most common case and it results from the fact that we aren't unmounting the filesystem. During a normal unmount the MS_ACTIVE flag will be cleared on the super block causing iput_final() to evict the inode when its reference count drops to zero. However, during a rollback MS_ACTIVE remains set since we're rolling back a live filesystem and need to preserve the existing super block. This allows inodes with a zero reference count to stay in the cache thereby violating the assertion. * destroy_inode() / zfs_sb_teardown() - There exists a small race between dropping the last reference on an inode and removing it from the zsb->z_all_znodes list. This is unlikely to occur but could also trigger the assertion which is incorrect. The inode may safely have a zero reference count in this case. Since allowing a zero reference count on the inode is expected and safe for both of these cases the simplest thing to do is remove the ASSERT. This code is only enabled for default builds so removing this entirely is a very safe change. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Chris Dunlop <[email protected]> Signed-off-by: Tim Chase <[email protected]> Closes #1417 Closes #1536
* Some nvlist allocations in hold processing need to use KM_PUSHPAGE.Tim Chase2013-12-021-2/+3
| | | | | | | | | | This should hopefully catch the rest of the allocations in the user hold/release processing that were missed by commit 65c67ea86e9f112177f1ad32de8e780f10798a64. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1852 Closes #1855
* Only commit the ZIL once in zpl_writepages() (msync() case).Etienne Dechamps2013-11-234-38/+89
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, using msync() results in the following code path: sys_msync -> zpl_fsync -> filemap_write_and_wait_range -> zpl_writepages -> write_cache_pages -> zpl_putpage In such a code path, zil_commit() is called as part of zpl_putpage(). This means that for each page, the write is handed to the DMU, the ZIL is committed, and only then do we move on to the next page. As one might imagine, this results in atrocious performance where there is a large number of pages to write: instead of committing a batch of N writes, we do N commits containing one page each. In some extreme cases this can result in msync() being ~700 times slower than it should be, as well as very inefficient use of ZIL resources. This patch fixes this issue by making sure that the requested writes are batched and then committed only once. Unfortunately, the implementation is somewhat non-trivial because there is no way to run write_cache_pages in SYNC mode (so that we get all pages) without making it wait on the writeback tag for each page. The solution implemented here is composed of two parts: - I added a new callback system to the ZIL, which allows the caller to be notified when its ITX gets written to stable storage. One nice thing is that the callback is called not only in zil_commit() but in zil_sync() as well, which means that the caller doesn't have to care whether the write ended up in the ZIL or the DMU: it will get notified as soon as it's safe, period. This is an improvement over dmu_tx_callback_register() that was used previously, which only supports DMU writes. The rationale for this change is to allow zpl_putpage() to be notified when a ZIL commit is completed without having to block on zil_commit() itself. - zpl_writepages() now calls write_cache_pages in non-SYNC mode, which will prevent (1) write_cache_pages from blocking, and (2) zpl_putpage from issuing ZIL commits. zpl_writepages() will issue the commit itself instead of relying on zpl_putpage() to do it, thus nicely batching the writes. Note, however, that we still have to call write_cache_pages() again in SYNC mode because there is an edge case documented in the implementation of write_cache_pages() whereas it will not give us all dirty pages when running in non-SYNC mode. Thus we need to run it at least once in SYNC mode to make sure we honor persistency guarantees. This only happens when the pages are modified at the same time msync() is running, which should be rare. In most cases there won't be any additional pages and this second call will do nothing. Note that this change also fixes a bug related to #907 whereas calling msync() on pages that were already handed over to the DMU in a previous writepages() call would make msync() block until the next TXG sync instead of returning as soon as the ZIL commit is complete. The new callback system fixes that problem. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1849 Closes #907
* Add I/O Read/Write AccountingBrian Behlendorf2013-11-211-2/+10
| | | | | | | | | | | | | Because ZFS bypasses the page cache we don't inherit per-task I/O accounting for free. However, the Linux kernel does provide helper functions allow us to perform our own accounting. These are most commonly used for direct IO which also bypasses the page cache, but they can be used for the common read/write call paths as well. Signed-off-by: Pavel Snajdr <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #313 Closes #1275
* Illumos #4322Steven Hartland2013-11-201-2/+4
| | | | | | | | | | | | | | | 4322 ZFS deadlock on dp_config_rwlock Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Ilya Usvyatsky <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4322 illumos/illumos-gate@c50d56f667f119d78fa3d94d6bef2c298ba556f6 Ported by: Chris Dunlop <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1886
* Remove the slog restriction on bootfs poolsBrian Behlendorf2013-11-141-24/+1
| | | | | | | | Under Linux this restriction does not apply because we have access to all the required devices. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1631
* Fixes (extends) support for selinux xattrs to more inode typesMatthew Thode2013-11-141-1/+5
| | | | | | | | Properly initialize SELinux xattrs for all inode types. The initial implementation accidentally only did this for files. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1832
* Reduce stack for traverse_visitbp() recursionBrian Behlendorf2013-11-144-42/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During pool import stack overflows may still occur due to the potentially deep recursion of traverse_visitbp(). This is most likely to occur when additional layers are added to the block device stack such as DM multipath. To minimize the stack usage for this call path the following changes were made: 1) Added the keywork 'noinline' to the vdev_*_map_alloc() functions to prevent them from being inlined by gcc. This reduced the stack usage of vdev_raidz_io_start() from 208 to 128 bytes, and vdev_mirror_io_start() from 144 to 128 bytes. 2) The 'saved_poolname' charater array in zfsdev_ioctl() was moved from the stack to the heap. This reduced the stack usage of zfsdev_ioctl() from 368 to 112 bytes. 3) The major saving came from slimming down traverse_visitbp() from from 224 to 144 bytes. Since this function is called recursively the 80 bytes saved per invokation adds up. The following changes were made: a) The 'hard' local variable was replaced by a TD_HARD() macro. b) The 'pd' local variable was replaced by 'td->td_pfd' references. c) The zbookmark_t was moved to the heap. This does cost us an additional memory allocation per recursion by that cost should still be minimal. The cost could be further reduced by adding a dedicated zbookmark_t slab cache. d) The variable declarations in 'if (BP_GET_LEVEL()) { }' were restructured to use the minimum amount of stack. This includes removing the 'cbp' local variable. Overall for the offending use case roughly 1584 of total stack space has been saved. This is enough to avoid overflowing the stack on stock kernels with 8k stacks. See #1778 for additional details. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Ned Bass <[email protected]> Closes #1778
* Some nvlist allocations in hold processing need to use KM_PUSHPAGE.Tim Chase2013-11-141-5/+8
| | | | | | | | | | Commit 95fd54a1c5b93bb2aa3e7dffc28c784b1e21a8bb restructured the hold/release processing and moved some of the work into the sync task. A number of nvlist allocations now need to use KM_PUSHPAGE. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1852 Closes #1855
* Fix rollback of mounted filesystem regressionTim Chase2013-11-141-3/+3
| | | | | | | | | | | The Illumos #3875 patch reverted a part of ZoL's 7b3e34b which added special-case error handling for zfs_rezget(). The error handling dealt with the case in which an all-ones object number ended up being passed to dnode_hold() and causing an EINVAL to be returned from zfs_rezget(). Signed-off-by: Brian Behlendorf <[email protected]> Closes #1859 Closes #1861
* Handle concurrent snapshot automounts failing due to EBUSY.Tim Chase2013-11-081-3/+11
| | | | | | | | | | | | | | | In the current snapshot automount implementation, it is possible for multiple mounts to attempted concurrently. Only one of the mounts will succeed and the other will fail. The failed mounts will cause an EREMOTE to be propagated back to the application. This commit works around the problem by adding a new exit status, MOUNT_BUSY to the mount.zfs program which is used when the underlying mount(2) call returns EBUSY. The zfs code detects this condition and treats it as if the mount had succeeded. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1819
* Honor CONFIG_FS_POSIX_ACL kernel optionMassimo Maggi2013-11-055-0/+22
| | | | | | | | | | | | | | | | The required Posix ACL interfaces are only available for kernels with CONFIG_FS_POSIX_ACL defined. Therefore, only enable Posix ACL support for these kernels. All major distribution kernels enable CONFIG_FS_POSIX_ACL by default. If your kernel does not support Posix ACLs the following warning will be printed at ZFS module load time. "ZFS: Posix ACLs disabled by kernel" Signed-off-by: Massimo Maggi <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1825
* 26126 panic system rather than corrupting pool if we hit bug 26100Matthew Ahrens2013-11-054-10/+26
| | | | | | | | | References: delphix/delphix-os@931c8aaab74b6412933d299890894262e2ef8380 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1650
* Switch allocations from KM_SLEEP to KM_PUSHPAGEBrian Behlendorf2013-11-052-2/+2
| | | | | | | | | | | | | | | | | A couple of kmem_alloc() allocations were using KM_SLEEP in the sync thread context. These were accidentally introduced by the recent set of Illumos patches. The solution is to switch to KM_PUSHPAGE. dsl_dataset_promote_sync() -> promote_hold() -> snaplist_make() -> kmem_alloc(sizeof (*snap), KM_SLEEP); dsl_dataset_user_hold_sync() -> dsl_onexit_hold_cleanup() -> kmem_alloc(sizeof (*ca), KM_SLEEP) Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3995Saso Kiselkov2013-11-051-8/+7
| | | | | | | | | | | | 3995 Memory leak of compressed buffers in l2arc_write_done References: https://illumos.org/issues/3995 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1688 Issue #1775
* Illumos #4168, #4169, #4170George Wilson2013-11-051-1/+9
| | | | | | | | | | | | | | | | | | | | 4168 ztest assertion failure in dbuf_undirty 4169 verbatim import causes zdb to segfault 4170 zhack leaves pool in ACTIVE state Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Eric Schrock <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4168 https://www.illumos.org/issues/4169 https://www.illumos.org/issues/4170 illumos/illumos-gate@7fdd916c474ea52896c671bbe7b56ba34a1ca132 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #4082Matthew Ahrens2013-11-052-1/+11
| | | | | | | | | | | | | | | | 4082 zfs receive gets EFBIG from dmu_tx_hold_free() Reviewed by: Eric Schrock <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/4082 illumos/illumos-gate@5253393b09789ec67bec153b866d7285a1cf1645 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3954, #4080, #4081George Wilson2013-11-053-7/+113
| | | | | | | | | | | | | | | | | | | 3954 metaslabs continue to load even after hitting zfs_mg_alloc_failure limit 4080 zpool clear fails to clear pool 4081 need zfs_mg_noalloc_threshold Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3954 https://www.illumos.org/issues/4080 https://www.illumos.org/issues/4081 illumos/illumos-gate@22e30981d82a0b6dc89253596ededafae8655e00 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #4046Matthew Ahrens2013-11-052-13/+14
| | | | | | | | | | | | | | | | | | | | 4046 dsl_dataset_t ds_dir->dd_lock is highly contended Reviewed by: Eric Schrock <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: https://www.illumos.org/issues/4046 illumos/illumos-gate@b62969f868a827f0823a084bc0af9c7d8b76c659 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. This commit removed dsl_dataset_namelen in Illumos, but that appears to have been removed from ZFSOnLinux in an earlier commit.
* Illumos #4047Matthew Ahrens2013-11-056-86/+94
| | | | | | | | | | | | | | | | | | | | | 4047 panic from dbuf_free_range() from dmu_free_object() while doing zfs receive Reviewed by: Adam Leventhal <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4047 illumos/illumos-gate@713d6c208802cfbb806329ec0d154b641b80c355 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. The exported symbol dmu_free_object() was renamed to dmu_free_long_object() in Illumos.
* Illumos #3996Matthew Ahrens2013-11-052-13/+27
| | | | | | | | | | | | | | | | | 3996 want a libzfs_core API to rollback to latest snapshot Reviewed by: Christopher Siden <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Andy Stormont <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3996 illumos/illumos-gate@a7027df17fad220a20367b9d1eb251bc6300d203 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3956, #3957, #3958, #3959, #3960, #3961, #3962George Wilson2013-11-056-85/+176
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 3956 ::vdev -r should work with pipelines 3957 ztest should update the cachefile before killing itself 3958 multiple scans can lead to partial resilvering 3959 ddt entries are not always resilvered 3960 dsl_scan can skip over dedup-ed blocks if physical birth != logical birth 3961 freed gang blocks are not resilvered and can cause pool to suspend 3962 ztest should print out zfs debug buffer before exiting Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3956 https://www.illumos.org/issues/3957 https://www.illumos.org/issues/3958 https://www.illumos.org/issues/3959 https://www.illumos.org/issues/3960 https://www.illumos.org/issues/3961 https://www.illumos.org/issues/3962 illumos/illumos-gate@b4952e17e8858d3225793b28788278de9fe6038d Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Porting notes: 1. zfs_dbgmsg_print() is only used in userland. Since we do not have mdb on Linux, it does not make sense to make it available in the kernel. This means that a build failure will occur if any future kernel patch depends on it. However, that is unlikely given that this functionality was added to support zdb. 2. zfs_dbgmsg_print() is only invoked for -VVV or greater log levels. This preserves the existing behavior of minimal noise when running with -V, and -VV. 3. In vdev_config_generate() the call to nvlist_alloc() was not changed to fnvlist_alloc() because we must pass KM_PUSHPAGE in the txg_sync context.
* Illumos #3949, #3950, #3952, #3953George Wilson2013-11-052-4/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 3949 ztest fault injection should avoid resilvering devices 3950 ztest: deadman fires when we're doing a scan 3951 ztest hang when running dedup test 3952 ztest: ztest_reguid test and ztest_fault_inject don't place nice together Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3949 https://www.illumos.org/issues/3950 https://www.illumos.org/issues/3951 https://www.illumos.org/issues/3952 illumos/illumos-gate@2c1e2b44148432fb7a509dd216a99299b6740250 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. The deadman thread was removed from ztest during the original port because it depended on Solaris thr_create() interface. This functionality should be reintroduced using the more portable pthreads.
* Illumos #3955Matthew Ahrens2013-11-051-2/+2
| | | | | | | | | | | | | | | | | 3955 ztest failure: assertion refcount_count(&tx->tx_space_written) + delta <= tx->tx_space_towrite Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan Kimmel <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3955 illumos/illumos-gate@be9000cc677e0a8d04e5be45c61d7370fc8c7b54 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3973Steven Hartland2013-11-051-4/+11
| | | | | | | | | | | | | | | 3973 zfs_ioc_rename alters passed in zc->zc_name Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3973 illumos/illumos-gate@a0c1127b147dc6a0372b141deb8c0c2b0195b8ea Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3834Matthew Ahrens2013-11-053-20/+102
| | | | | | | | | | | | | | | 3834 incremental replication of 'holey' file systems is slow Reviewed by: Adam Leventhal <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3834 illumos/illumos-gate@ca48f36f20f6098ceb19d5b084b6b3d4b8eca9fa Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3836Matthew Ahrens2013-11-051-3/+26
| | | | | | | | | | | | | | | 3836 zio_free() can be processed immediately in the common case Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/3836 illumos/illumos-gate@9cb154a3c9f170904dce9bad5bd5a7d256b922a4 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3112, #3113, #3114Matthew Ahrens2013-11-053-11/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 3112 ztest does not honor ZFS_DEBUG 3113 ztest should use watchpoints to protect frozen arc bufs 3114 some leaked nvlists in zfsdev_ioctl Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Matt Amdur <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Christopher Siden <[email protected]> Approved by: Eric Schrock <[email protected]> References: https://www.illumos.org/issues/3112 https://www.illumos.org/issues/3113 https://www.illumos.org/issues/3114 illumos/illumos-gate@cd1c8b85eb30b568e9816221430c479ace7a559d The /proc/self/cmd watchpoint interface is specific to Solaris. Therefore, the #3113 implementation was reworked to use the more portable mprotect(2) system call. When the pages are watched they are marked read-only for protection. Any write to the protected address range immediately trigger a SIGSEGV. The pages are marked writable again when they are unwatched. Ported-by: Brian Behlendorf <[email protected]> Issue #1489
* Illumos #3236George Wilson2013-11-058-55/+234
| | | | | | | | | | | | | | | | | | | | 3236 zio nop-write Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: illumos/illumos-gate@80901aea8e78a2c20751f61f01bebd1d5b5c2ba5 https://www.illumos.org/issues/3236 Porting Notes 1. This patch is being merged dispite an increased instance of https://www.illumos.org/issues/3113 being triggered by ztest. Ported-by: Brian Behlendorf <[email protected]> Issue #1489
* Illumos #3875Keith M Wesolowski2013-11-045-67/+162
| | | | | | | | | | | | | | | 3875 panic in zfs_root() after failed rollback Reviewed by: Jerry Jelinek <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Gordon Ross <[email protected]> References: https://www.illumos.org/issues/3875 illumos/illumos-gate@91948b51b8e978ddc88a36b2bc3ae83c20cdc9aa Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3888Matthew Ahrens2013-11-043-51/+102
| | | | | | | | | | | | | | | | | | | | | | | | 3888 zfs recv -F should destroy any snapshots created since the incremental source Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Peng Dai <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3888 illumos/illumos-gate@34f2f8cf94052481c81be2e134b94a00b501bf21 Porting notes: 1. Commit 1fde1e37208c2f56c72c70a06676676f04b65998 wrapped a declaration in dsl_dataset_modified_since_lastsnap in ASSERTV(). The ASSERTV() and local variable have been removed to avoid an unused variable warning. Signed-off-by: Brian Behlendorf <[email protected]> Ported-by: Richard Yao <[email protected]> Issue #1775
* Illumos #3894Keith M Wesolowski2013-11-043-5/+20
| | | | | | | | | | | | | | 3894 zfs should not allow snapshot of inconsistent dataset Reviewed by: Matthew Ahrens <[email protected]> Approved by: Gordon Ross <[email protected]> References: https://www.illumos.org/issues/3894 illumos/illumos-gate@ca48f36f20f6098ceb19d5b084b6b3d4b8eca9fa Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3829Matthew Ahrens2013-11-042-11/+0
| | | | | | | | | | | | | | | 3829 fix for 3740 changed behavior of zfs destroy/hold/release ioctl Reviewed by: Matt Amdur <[email protected]> Reviewed by: Christopher Siden <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3829 illumos/illumos-gate@bb6e70758d0c30c09f148026d6e686e21cfc8d18 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3740Steven Hartland2013-11-044-238/+382
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Reviewed by: Matthew Ahrens <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3740 illumos/illumos-gate@a7a845e4bf22fd1b2a284729ccd95c7370a0438c Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. 13fe019870c8779bf2f5b3ff731b512cf89133ef introduced a merge conflict in dsl_dataset_user_release_tmp where some variables were moved outside of the preprocessor directive. 2. dea9dfefdd747534b3846845629d2200f0616dad made the previous merge conflict worse by switching KM_SLEEP to KM_PUSHPAGE. This is notable because this commit refactors the code, adding a new KM_SLEEP allocation. It is not clear to me whether this should be converted to KM_PUSHPAGE. 3. We had a merge conflict in libzfs_sendrecv.c because of copyright notices. 4. Several small C99 compatibility fixed were made.
* Illumos #3744Will Andrews2013-11-042-14/+31
| | | | | | | | | | | | | | | | | | | | | | 3744 zfs shouldn't ignore errors unmounting snapshots Reviewed by: Matthew Ahrens <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3744 illumos/illumos-gate@fc7a6e3fefc649cb65c8e2a35d194781445008b0 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. There is no clear way to distinguish between a failure when we tried to unmount the snapdir of a zvol (which does not exist) and the failure when we try to unmount a snapdir of a dataset, so the changes to zfs_unmount_snap() were dropped in favor of an altered Linux function that unconditionally returns 0.
* Illumos #3743Will Andrews2013-11-043-16/+30
| | | | | | | | | | | | | | | | 3743 zfs needs a refcount audit Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Eric Schrock <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3743 illumos/illumos-gate@b287be1ba86043996f49b1cc34c80cc620f9b841 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3742Will Andrews2013-11-0422-109/+95
| | | | | | | | | | | | | | | | | | | | | 3742 zfs comments need cleaner, more consistent style Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Eric Schrock <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3742 illumos/illumos-gate@f7170741490edba9d1d9c697c177c887172bc741 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. The change to zfs_vfsops.c was dropped because it involves zfs_mount_label_policy, which does not exist in the Linux port.
* Illumos #3741Will Andrews2013-11-0410-11/+141
| | | | | | | | | | | | | | | 3741 zfs needs better comments Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Eric Schrock <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3741 illumos/illumos-gate@3e30c24aeefdee1631958ecf17f18da671781956 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3699, #3739Martin Matuska2013-11-042-15/+27
| | | | | | | | | | | | | | | | | 3699 zfs hold or release of a non-existent snapshot does not output error 3739 cannot set zfs quota or reservation on pool version < 22 Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Eric Shrock <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/3699 https://www.illumos.org/issues/3739 illumos/illumos-gate@013023d4ed2f6d0cf75380ec686a4aac392b4e43 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3582, #3584Adam Leventhal2013-11-045-23/+37
| | | | | | | | | | | | | | | | | | | | 3582 zfs_delay() should support a variable resolution 3584 DTrace sdt probes for ZFS txg states Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Richard Elling <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: https://www.illumos.org/issues/3582 illumos/illumos-gate@0689f76 Ported by: Ned Bass <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* 6977619 NULL pointer deference in sa_handle_get_from_db()Mark Shellenbaum2013-11-041-8/+22
| | | | | | | | | References: illumos/illumos-gate@44bffe012cad6481c82ad67bacd6b40bd29def2b Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* 6939941 problem with moving files in zfsMark Shellenbaum2013-11-041-2/+2
| | | | | | | | | | | | | | References: illumos/illumos-gate@d39ee142a97a7c58f60f7b52c62409f2ff64b234 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. This commit was so old that only two lines applied to the modern code base.
* Illumos #3642, #3643George Wilson2013-11-013-11/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | 3642 dsl_scan_active() should not issue I/O to determine if async destroying is active 3643 txg_delay should not hold the tc_lock Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Approved by: Gordon Ross <[email protected]> References: https://www.illumos.org/issues/3642 https://www.illumos.org/issues/3643 illumos/illumos-gate@4a92375985c37d61406d66cd2b10ee642eb1f5e7 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting Notes: 1. The alignment assumptions for the tx_cpu structure assume that a kmutex_t is 8 bytes. This isn't true under Linux but tc_pad[] was adjusted anyway for consistency since this structure was never carefully aligned in ZoL. If careful alignment does impact performance significantly this should be reworked to be portable.
* Illumos #3645, #3692Matthew Ahrens2013-10-311-6/+8
| | | | | | | | | | | | | | | | | | | 3645 dmu_send_impl: possibilty of pool hold leak 3692 Panic on zfs receive of a recursive deduplicated stream Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Dan McDonald <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3645 https://www.illumos.org/issues/3692 illumos/illumos-gate@de8d9cff565e928d0ace86f3ea0e2b15094d61df Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1792 Issue #1775
* Illumos #3598Matthew Ahrens2013-10-3155-779/+797
| | | | | | | | | | | | | | | | | | | | | | | | | | | 3598 want to dtrace when errors are generated in zfs Reviewed by: Dan Kimmel <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: https://www.illumos.org/issues/3598 illumos/illumos-gate@be6fd75a69ae679453d9cda5bff3326111e6d1ca Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Porting notes: 1. include/sys/zfs_context.h has been modified to render some new macros inert until dtrace is available on Linux. 2. Linux-specific changes have been adapted to use SET_ERROR(). 3. I'm NOT happy about this change. It does nothing but ugly up the code under Linux. Unfortunately we need to take it to avoid more merge conflicts in the future. -Brian
* Illumos #3517Yuri Pankov2013-10-311-2/+3
| | | | | | | | | | | | | | | | 3517 importing pool with autoreplace=on and "hole" vdevs crashes syseventd Reviewed by: Albert Lee <[email protected]> Reviewed by: Jeffry Molanus <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3517 illumos/illumos-gate@efb4a871d8fd510a833bdca610528dde5ed69e42 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3603, #3604: bobj improvementsMatthew Ahrens2013-10-312-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | 3603 panic from bpobj_enqueue_subobj() 3604 zdb should print bpobjs more verbosely 3871 GCC 4.5.3 does not like issue 3604 patch Reviewed by: Henrik Mattson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/3603 https://www.illumos.org/issues/3604 https://www.illumos.org/issues/3871 illumos/illumos-gate@d04756377ddd1cf28ebcf652541094e17b03c889 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775 Note that the patch from Illumos issue 3871 is not accepted into Illumos at the time of this writing. It is something that I wrote when porting this. Documentation is in the Illumos issue.
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