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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
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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
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3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first
argument is zero
Reviewed by Matt Ahrens <[email protected]>
Reviewed by George Wilson <[email protected]>
Approved by Eric Schrock <[email protected]>
References:
illumos/illumos-gate@fb09f5aad449c97fe309678f3f604982b563a96f
https://illumos.org/issues/3006
Requires:
zfsonlinux/spl@1c6d149feb4033e4a56fb987004edc5d45288bcb
Ported-by: Tim Chase <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #1509
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Callers of zap_deref_leaf() must be careful to drop leaf->l_rwlock
since that function returns with the lock held on success. All other
callers drop the lock correctly but it seems fzap_cursor_move_to_key()
does not. This may block writers or cause VERIFY failures when the
lock is freed.
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #1215
Closes zfsonlinux/spl#143
Closes zfsonlinux/spl#97
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3104 eliminate empty bpobjs
Reviewed by: George Wilson <[email protected]>
Reviewed by: Adam Leventhal <[email protected]>
Reviewed by: Christopher Siden <[email protected]>
Reviewed by: Garrett D'Amore <[email protected]>
Approved by: Eric Schrock <[email protected]>
References:
illumos/illumos-gate@f17457368189aa911f774c38c1f21875a568bdca
illumos changeset: 13782:8f78aae28a63
https://www.illumos.org/issues/3104
Ported-by: Brian Behlendorf <[email protected]>
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2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Richard Lowe <[email protected]>
Reviewed by: Dan Kruchinin <[email protected]>
Approved by: Eric Schrock <[email protected]>
References:
illumos/illumos-gate@53089ab7c84db6fb76c16ca50076c147cda11757
illumos/illumos-gate@ad135b5d644628e791c3188a6ecbd9c257961ef8
illumos changeset: 13700:2889e2596bd6
https://www.illumos.org/issues/2619
https://www.illumos.org/issues/2747
NOTE: The grub specific changes were not ported. This change
must be made to the Linux grub packages.
Ported-by: Brian Behlendorf <[email protected]>
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Differences between how paging is done on Solaris and Linux can cause
deadlocks if KM_SLEEP is used in any the following contexts.
* The txg_sync thread
* The zvol write/discard threads
* The zpl_putpage() VFS callback
This is because KM_SLEEP will allow for direct reclaim which may result
in the VM calling back in to the filesystem or block layer to write out
pages. If a lock is held over this operation the potential exists to
deadlock the system. To ensure forward progress all memory allocations
in these contexts must us KM_PUSHPAGE which disables performing any I/O
to accomplish the memory allocation.
Previously, this behavior was acheived by setting PF_MEMALLOC on the
thread. However, that resulted in unexpected side effects such as the
exhaustion of pages in ZONE_DMA. This approach touchs more of the zfs
code, but it is more consistent with the right way to handle these cases
under Linux.
This is patch lays the ground work for being able to safely revert the
following commits which used PF_MEMALLOC:
21ade34 Disable direct reclaim for z_wr_* threads
cfc9a5c Fix zpl_writepage() deadlock
eec8164 Fix ASSERTION(!dsl_pool_sync_context(tx->tx_pool))
Signed-off-by: Richard Yao <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #726
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Properly initialize rwlock primitives.
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'lacks a cast'
Gcc -Wall warn: 'comparison between pointer and integer'
Signed-off-by: Brian Behlendorf <[email protected]>
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