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* Add tracepoints for taskq entry lifetime eventsPrakash Surya2019-11-0110-6/+181
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds some new DTRACE_PROBE* endpoints so that we can observe taskq latencies on a system. Additionally, a new "taskqlatency.bt" script is added to do this observation via "bpftrace". Lastly, a "zfs-trace.sh" script is added to wrap "bpftrace" with the proper options required to run and use "taskqlatency.bt". For example, with these changes in place, a user can run the following: $ cd ./contrib/bpftrace $ sudo ./zfs-trace.sh taskqlatency.bt Attaching 6 probes... ^C Here's some example output, showing latency information for time spent executing the taskq entry's function: @exec_lat_us[dp_sync_taskq, userquota_updates_task]: [2, 4) 5 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [4, 8) 0 | | [8, 16) 1 |@@@@@@@@@@ | [16, 32) 2 |@@@@@@@@@@@@@@@@@@@@ | @exec_lat_us[z_wr_int_h, zio_execute]: [8, 16) 16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [16, 32) 2 |@@@@@@ | @exec_lat_us[z_wr_iss_h, zio_execute]: [16, 32) 4 |@@@@@@@@@@@@@@@@ | [32, 64) 13 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [64, 128) 1 |@@@@ | @exec_lat_us[z_ioctl_int, zio_execute]: [2, 4) 1 |@@@@ | [4, 8) 11 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [8, 16) 8 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | @exec_lat_us[dp_sync_taskq, sync_dnodes_task]: [2, 4) 1 |@@@@@@ | [4, 8) 7 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [8, 16) 8 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [16, 32) 2 |@@@@@@@@@@@@@ | [32, 64) 4 |@@@@@@@@@@@@@@@@@@@@@@@@@@ | [64, 128) 1 |@@@@@@ | [128, 256) 0 | | [256, 512) 1 |@@@@@@ Here's some example output, showing latency information for time spent waiting on the taskq, prior to starting execution of entry's function: @queue_lat_us[dp_sync_taskq]: [2, 4) 1 |@@@@ | [4, 8) 7 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [8, 16) 2 |@@@@@@@@ | [16, 32) 3 |@@@@@@@@@@@@@ | [32, 64) 12 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [64, 128) 6 |@@@@@@@@@@@@@@@@@@@@@@@@@@ | [128, 256) 0 | | [256, 512) 1 |@@@@ | @queue_lat_us[z_wr_iss]: [4, 8) 4 |@@@@ | [8, 16) 13 |@@@@@@@@@@@@@@@ | [16, 32) 6 |@@@@@@@ | [32, 64) 2 |@@ | [64, 128) 12 |@@@@@@@@@@@@@@ | [128, 256) 15 |@@@@@@@@@@@@@@@@@@ | [256, 512) 33 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1K) 27 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [1K, 2K) 7 |@@@@@@@@ | [2K, 4K) 14 |@@@@@@@@@@@@@@@@ | [4K, 8K) 14 |@@@@@@@@@@@@@@@@ | [8K, 16K) 23 |@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [16K, 32K) 43 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| @queue_lat_us[z_wr_int]: [2, 4) 10 |@@@@@ | [4, 8) 71 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [8, 16) 88 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [16, 32) 50 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [32, 64) 65 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [64, 128) 43 |@@@@@@@@@@@@@@@@@@@@@@@@@ | [128, 256) 19 |@@@@@@@@@@@ | [256, 512) 3 |@ | [512, 1K) 1 | | Reviewed by: Brad Lewis <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Prakash Surya <[email protected]> Closes #9525
* Enable use of DTRACE_PROBE* macros in "spl" modulePrakash Surya2019-11-0129-39/+123
| | | | | | | | | | | | | | | | | | | | | | | | | | | This change modifies some of the infrastructure for enabling the use of the DTRACE_PROBE* macros, such that we can use tehm in the "spl" module. Currently, when the DTRACE_PROBE* macros are used, they get expanded to create new functions, and these dynamically generated functions become part of the "zfs" module. Since the "spl" module does not depend on the "zfs" module, the use of DTRACE_PROBE* in the "spl" module would result in undefined symbols being used in the "spl" module. Specifically, DTRACE_PROBE* would turn into a function call, and the function being called would be a symbol only contained in the "zfs" module; which results in a linker and/or runtime error. Thus, this change adds the necessary logic to the "spl" module, to mirror the tracing functionality available to the "zfs" module. After this change, we'll have a "trace_zfs.h" header file which defines the probes available only to the "zfs" module, and a "trace_spl.h" header file which defines the probes available only to the "spl" module. Reviewed by: Brad Lewis <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Prakash Surya <[email protected]> Closes #9525
* Wrap Linux module macrosMatthew Macy2019-11-0113-46/+119
| | | | | | | | | | MODULE_VERSION is already defined on FreeBSD. Wrap all of the used MODULE_* macros for the sake of consistency and portability. Add a user space noop version to reduce the need for _KERNEL ifdefs. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9542
* Prefix struct rangelockMatthew Macy2019-11-019-74/+80
| | | | | | | | | | A struct rangelock already exists on FreeBSD. Add a zfs_ prefix as per our convention to prevent any conflict with existing symbols. This change is a follow up to 2cc479d0. Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9534
* Remove ECKSUM alias in zinjectMatthew Macy2019-11-011-2/+0
| | | | | | | | The custom ECKSUM errno is defined as appropriate by the platform specific os/linux/spl/sys/errno.h header. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9537
* Fix icp build on FreeBSDMatthew Macy2019-11-012-23/+22
| | | | | | | | | | | | - ROTATE_LEFT is not used by amd64, move it down within the scope it's used to silence a clang warning. - __unused is an alias for the compiler annotation __attribute__((__unused__)) on FreeBSD. Rename the field to ____unused. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9538
* Return an error code from zfs_acl_chmod_setattrMatthew Macy2019-11-013-3/+6
| | | | | | | | The FreeBSD implementation can fail, allow this function to fail and add the required error handling for Linux. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9541
* Move sha2.h to platform codeMatthew Macy2019-10-315-5/+153
| | | | | | | | | FreeBSD has its own sha routines that the port uses. Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9530
* ZTS: Fix removal_with_errorsBrian Behlendorf2019-10-311-2/+9
| | | | | | | | | | | | The removal_with_errors.ksh test case could occasionally complete the removal process instead of canceling due to an injected error. To prevent this false positive, export and import the pool between test phases to flush the ARC cache. Furthermore, double the amount of data in the pool to increase the removal time. Reviewed-by: Ryan Moeller <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #9528
* Don't cast away constMatthew Macy2019-10-311-1/+1
| | | | | | | | | Follow up to 511fce6b which missed a cast. Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9533
* Include prototypes for vdev_initializeMatthew Macy2019-10-311-1/+2
| | | | | | | | Address two prototype related warnings emitted by clang. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9535
* Factor Linux specific code out of spa_misc.cMatthew Macy2019-10-316-77/+125
| | | | | | | | | | Move these Linux module parameter get/set helpers in to platform specific code. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9457
* dracut/zfs-load-key.sh: properly remove prefixesalaviss2019-10-301-1/+1
| | | | | | | | | | | Removes the 'ZFS=' prefix from $BOOTFS instead of $root. This makes sure that the 'zfs:' prefix remains stripped so that users with 'root=zfs:dataset' cmdline can have key loaded on boot again. Reviewed-by: Garrett Fields <[email protected]> Reviewed-by: Dacian Reece-Stremtan <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Hiếu Lê <[email protected]> Closes #9520
* Fix contrib/zcp/Makefile.amBrian Behlendorf2019-10-301-1/+1
| | | | | | | | | Remove the stray leading + from the Makefile. This was preventing the autosnap.lua channel program from being properly included by `make dist`. Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #9527
* Add AVX512BW variant of fletcherRomain Dolbeau2019-10-304-1/+57
| | | | | | | | | | | It is much faster than AVX512F when byteswapping on Skylake-SP and newer, as we can do the byteswap in a single vshufb instead of many instructions. Reviewed by: Gvozden Neskovic <[email protected]> Reviewed-by: Chunwei Chen <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Romain Dolbeau <[email protected]> Closes #9517
* Fix 'zfs change-key' with unencrypted childTom Caputi2019-10-302-9/+18
| | | | | | | | | | | | | | Currently, when you call 'zfs change-key' on an encrypted dataset that has an unencrypted child, the code will trigger a VERIFY. This VERIFY is leftover from before we allowed unencrypted datasets to exist underneath encrypted ones. This patch fixes the issue by simply replacing the VERIFY with an early return when recursing through datasets. Reviewed by: Jason King <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #9524
* Add wrapper for Linux BLKFLSBUF ioctlMatthew Macy2019-10-284-2/+9
| | | | | | | | | | FreeBSD has no analog. Buffered block devices were removed a decade plus ago. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9508
* Minor spa portability fixesMatthew Macy2019-10-282-3/+6
| | | | | | | | | | | | - FreeBSD's rootpool import code uses spa_config_parse - Move the zvol_create_minors call out from under the spa_namespace_lock in spa_import. It isn't needed and it causes a lock order reversal on FreeBSD. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9499
* Fix zpool history unbounded memory usageChunwei Chen2019-10-283-26/+41
| | | | | | | | | | | | In original implementation, zpool history will read the whole history before printing anything, causing memory usage goes unbounded. We fix this by breaking it into read-print iterations. Reviewed-by: Tom Caputi <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Closes #9516
* Fix for ARC sysctls ignored at runtimeloli10K2019-10-2610-42/+178
| | | | | | | | | | | | | | This change leverage module_param_call() to run arc_tuning_update() immediately after the ARC tunable has been updated as suggested in cffa8372 code review. A simple test case is added to the ZFS Test Suite to prevent future regressions in functionality. Reviewed-by: Matt Macy <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #9487 Closes #9489
* Remove unneeded header from libzpool/kernel.cMatthew Macy2019-10-262-36/+0
| | | | | | | | | The sys/signal.h header doesn't exist on FreeBSD, nor is it needed on Linux. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9510
* Fix header guard typoMatthew Macy2019-10-261-1/+1
| | | | | | | Fix header guard typo accidentally introduced by #9497. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9514
* ZTS: Move more tests to linux.runRyan Moeller2019-10-252-11/+11
| | | | | | | | | | Tests that rely on special filesystems that are specific to Linux should only be run on Linux. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Giuseppe Di Natale <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9512
* Remove unused headers from uu_string.cMatthew Macy2019-10-251-2/+0
| | | | | | | | The malloc.h include is gratuitous and runs in to the following error on FreeBSD: Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9509
* Use zfs_ioctl() in zinject.cMatthew Macy2019-10-251-5/+5
| | | | | | | | | | | | Consistently use the `zfs_ioctl()` wrapper since `ioctl()` cannot be called directly due to differing semantics between platforms. Follow up PR to #9492. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9507
* Remove non-portable pointer is valid assertMatthew Macy2019-10-251-1/+0
| | | | | | | | | | This assert makes non portable assumptions about the state of memory returned by the memory allocator. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9506
* Move final zvol_remove_minors to common codeMatthew Macy2019-10-252-10/+10
| | | | | | | | | | This logic is not platform dependent and should reside in the common code. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9505
* Move platform dependent errno aliasesMatthew Macy2019-10-255-11/+22
| | | | | | | | | EBADE, EBADR, and ENOANO do not exist on FreeBSD The libspl errno.h is similarly platform dependent. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9498
* Remove sdt.hMatthew Macy2019-10-258-74/+34
| | | | | | | | | It's mostly a noop on ZoL and it conflicts with platforms that support dtrace. Remove this header to resolve the conflict. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9497
* Fix incremental recursive encrypted receiveTom Caputi2019-10-242-6/+34
| | | | | | | | | | | | | | | | | | | | Currently, incremental recursive encrypted receives fail to work for any snapshot after the first. The reason for this is because the check in zfs_setup_cmdline_props() did not properly realize that when the user attempts to use '-x encryption' in this situation, they are not really overriding the existing encryption property and instead are attempting to prevent it from changing. This resulted in an error message stating: "encryption property 'encryption' cannot be set or excluded for raw or incremental streams". This problem is fixed by updating the logic to expect this use case. Reviewed-by: loli10K <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #9494
* ZTS: Move tmpfile tests to linux.runRyan Moeller2019-10-243-5/+9
| | | | | | | O_TMPFILE is not available on FreeBSD. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9503
* ZTS: Consistency pass for .ksh extensionsRyan Moeller2019-10-243-4/+4
| | | | | | | | * Use .ksh extension for ksh scripts, not .sh * Remove .ksh extension from tests in common.run Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9502
* Linux 4.14, 4.19, 5.0+ compat: SIMD save/restoreBrian Behlendorf2019-10-2419-294/+276
| | | | | | | | | | | | | | | | | | | | Contrary to initial testing we cannot rely on these kernels to invalidate the per-cpu FPU state and restore the FPU registers. Nor can we guarantee that the kernel won't modify the FPU state which we saved in the task struck. Therefore, the kfpu_begin() and kfpu_end() functions have been updated to save and restore the FPU state using our own dedicated per-cpu FPU state variables. This has the additional advantage of allowing us to use the FPU again in user threads. So we remove the code which was added to use task queues to ensure some functions ran in kernel threads. Reviewed-by: Fabian Grünbichler <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #9346 Closes #9403
* Use zfs_ioctl with zfs_cmd_t in libzfsMatthew Macy2019-10-237-27/+27
| | | | | | | | | Consistently use the `zfs_ioctl()` wrapper since `ioctl()` cannot be called directly due to differing semantics between platforms. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9492
* Don't call arc_buf_destroy on unallocated arc_bufchrisrd2019-10-231-4/+5
| | | | | | | | | | Fixes an obvious issue of calling arc_buf_destroy() on an unallocated arc_buf. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Paul Dagnelie <[email protected]> Signed-off-by: Chris Dunlop <[email protected]> Closes #9453
* Use platform independent error code for libzfs_run_process_implMatthew Macy2019-10-231-1/+1
| | | | | | Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9493
* Use correct format string when printing int8Matthew Macy2019-10-201-1/+1
| | | | | | | | Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9486
* Remove gratuitous Linux only include in ztest & zdbMatthew Macy2019-10-192-2/+0
| | | | | | | | We don't need to include stdio_ext.h Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9483
* ZTS: Written props test fails with 4k disksJohn Wren Kennedy2019-10-181-5/+5
| | | | | | | | | | | | With 4k disks, this test will fail in the last section because the expected human readable value of 20.0M is reported as 20.1M. Rather than use the human readable property, switch to the parsable property and verify that the values are reasonably close. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: John Kennedy <[email protected]> Closes #9477
* Name anonymous enum of KMC_BIT constantsSerapheim Dimitropoulos2019-10-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Giving a name to this enum makes it discoverable from debugging tools like DRGN and SDB. For example, with the name proposed on this patch we can iterate over these values in DRGN: ``` >>> prog.type('enum kmc_bit').enumerators (('KMC_BIT_NOTOUCH', 0), ('KMC_BIT_NODEBUG', 1), ('KMC_BIT_NOMAGAZINE', 2), ('KMC_BIT_NOHASH', 3), ('KMC_BIT_QCACHE', 4), ('KMC_BIT_KMEM', 5), ('KMC_BIT_VMEM', 6), ('KMC_BIT_SLAB', 7), ... ``` This enables SDB to easily pretty-print the flags of the spl_kmem_caches in the system like this: ``` > spl_kmem_caches -o "name,flags,total_memory" name flags total_memory ------------------------ ----------------------- ------------ abd_t KMC_NOMAGAZINE|KMC_SLAB 4.5MB arc_buf_hdr_t_full KMC_NOMAGAZINE|KMC_SLAB 12.3MB ... <cropped> ... ddt_cache KMC_VMEM 583.7KB ddt_entry_cache KMC_NOMAGAZINE|KMC_SLAB 0.0B ... <cropped> ... zio_buf_1048576 KMC_NODEBUG|KMC_VMEM 0.0B ... <cropped> ... ``` Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Serapheim Dimitropoulos <[email protected]> Closes #9478
* Update skc_obj_alloc for spl kmem caches that are backed by LinuxSerapheim Dimitropoulos2019-10-182-6/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, for certain sizes and classes of allocations we use SPL caches that are backed by caches in the Linux Slab allocator to reduce fragmentation and increase utilization of memory. The way things are implemented for these caches as of now though is that we don't keep any statistics of the allocations that we make from these caches. This patch enables the tracking of allocated objects in those SPL caches by making the trade-off of grabbing the cache lock at every object allocation and free to update the respective counter. Additionally, this patch makes those caches visible in the /proc/spl/kmem/slab special file. As a side note, enabling the specific counter for those caches enables SDB to create a more user-friendly interface than /proc/spl/kmem/slab that can also cross-reference data from slabinfo. Here is for example the output of one of those caches in SDB that outputs the name of the underlying Linux cache, the memory of SPL objects allocated in that cache, and the percentage of those objects compared to all the objects in it: ``` > spl_kmem_caches | filter obj.skc_name == "zio_buf_512" | pp name ... source total_memory util ----------- ... ----------------- ------------ ---- zio_buf_512 ... kmalloc-512[SLUB] 16.9MB 8 ``` Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Serapheim Dimitropoulos <[email protected]> Closes #9474
* OpenZFS restructuring - ARC memory pressureMatthew Macy2019-10-185-438/+527
| | | | | | | | | | | Factor Linux specific memory pressure handling out of ARC. Each platform will have different available interfaces for managing memory pressure. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Jorgen Lundman <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9472
* Detect if sed supports --in-placeRyan Moeller2019-10-165-3/+20
| | | | | | | | | | | | | | Not all versions of sed have the --in-place flag. Detect support for the flag during ./configure and provide a fallback mechanism for those systems where sed's behavior differs. The autoconf variable ${ac_inplace} can be used to choose the correct flags for editing a file in place with sed. Replace violating usages in Makefile.am with ${ac_inplace}. Reviewed-by: Chris Dunlop <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ryan Moeller <[email protected]> Closes #9463
* Make zfsdev_getminor signature cross platformMatthew Macy2019-10-164-16/+10
| | | | | | | | Only pass the file descriptor to make zfsdev_get_miror() portable. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9466
* Move linux specific mmp module_param_call handler to platform codeMatthew Macy2019-10-163-28/+47
| | | | | | Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9465
* Add default case to lua kernel codeMatthew Macy2019-10-161-0/+6
| | | | | | | | | | Some platforms, e.g. FreeBSD, support user space setjmp semantics in kernel. Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9450
* Fix signature for private functions without header declarationsMatthew Macy2019-10-162-2/+2
| | | | | | | | Clang will complain if a function has no prior declaration Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9467
* Remove dead code and cleanup scoping in dmu_send.cMatthew Macy2019-10-131-16/+5
| | | | | | | | | | | | | This addresses a number of problems with dmu_send.c: * bp_span is unused which makes clang complain * dump_write conflicts with FreeBSD's existing core dump code * range_alloc is private to the file and not declared in any headers causing clang to complain Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9432
* Don't call sizeof on voidPaul Dagnelie2019-10-132-7/+7
| | | | | | | | | We get the sizeof the appropriate type, and don't cast away const. Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: Matt Macy <[email protected]> Signed-off-by: Paul Dagnelie <[email protected]> Closes #9455
* Move zfs_onexit_fd_hold to platform codeMatthew Macy2019-10-133-33/+70
| | | | | | | | FreeBSD has a very different implementation. Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Matt Macy <[email protected]> Closes #9442
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