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* MFC r279437,r284107:ngie2016-01-031-0/+263
| | | | | | | | | | | | | | | | | r279437 (by rstone): Allow Illumos code to co-exist with nv(9) r284107 (by avg): compat nvpair.h: make sure that the names are mangled only for kernel Currently there is no good reason to mangle the userland API. The change was introduced in eac1d566b46edef765754203bef22c75c1699966, r279437. Also see https://reviews.freebsd.org/D1881. I am still convinced that nv should not have introduced intentionally conflicting API.
* MFC nv(3) and part of nv(9) to stable/10ngie2015-12-313-0/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This includes the following revisions from head: r258065,r258594,r259430,r260222,r261407,r261408,r263479,r264021,r266351, r269603,r271026,r271027,r271028,r271241,r271578,r271579,r271847,r272102, r272843,r273752,r277920,r277921,r277925,r277926,r277927,r279421,r279422, r279423,r279424,r279425,r279426,r279427,r279428,r279429,r279430,r279431, r279432,r279434,r279435,r279436,r279438,r279439,r279440,r279760,r282122, r282254,r282257,r282304,r282312,r285339,r288340 This change reverts stable/10@r282122 and stable/10@r288340, and re-MFCs the series again (r282122, r285339, and r288340). More changes are pending to nv(9)/pci(4) after further review/work. Please see the Phabricator review for more details (both https://reviews.freebsd.org/D4232 and https://reviews.freebsd.org/D4249 ). - Tested with: -- Booting VMware Fusion 8.1.0 running on a Haswell Apple Macbook Pro -- Booting a Haswell machine with zfs and running some stress workloads with VirtualBox guests -- make tinderbox -- kyua test -k /usr/tests/lib/libnv Differential Revision: https://reviews.freebsd.org/D4249 (part of a larger diff) Relnotes: yes Reviewed by: oshogbo (implicit), sbruno (implicit) Submitted by: Kevin Bowling <kevin.bowling@kev009.com> Sponsored by: EMC / Isilon Storage Division
* MFC r289195:ngie2015-11-152-1/+4
| | | | | | | | | | | | | | | | | | | | | | Integrate the tests from lib/libarchive, usr.bin/cpio, and usr.bin/tar in to the FreeBSD test suite functional_test.sh was ported from bin/sh/tests/functional_test.sh, as a small wrapper around libarchive_test, bsdcpio_test, and bsdtar_test provided by upstream. A handful of testcases in lib/libarchive/tests have been disabled as they were failing when run with kyua test (see BROKEN_TESTS in lib/libarchive/tests/Makefile) As a sidenote: this removes the check/test targets from the Makefiles as they don't match the pattern used in the rest of the FreeBSD test suite. Sponsored by: EMC / Isilon Storage Division Conflicts: lib/libarchive/test usr.bin/cpio/test
* MFC r290191 (by avg):mav2015-11-131-10/+21
| | | | | | | | | | | | | | l2arc: do not call trim_map_free() for blocks with zero b_asize b_asize can be zero if the block is compressed into an empty block (ZIO_COMPRESS_EMPTY) and the trim code asserts that meaningless zero-sized trimming is not attempted. The logic for calling trim_map_free() is extracted into a new function l2arc_trim() to minimize code duplication. PR: 203473 Reported by: Willem Jan Withagen <wjw@digiware.nl> Tested by: Willem Jan Withagen <wjw@digiware.nl>
* MFC r289562: 6328 Fix cstyle errors in zfs codebasemav2015-11-1316-46/+44
| | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed by: Jorgen Lundman <lundman@lundman.net> Approved by: Robert Mustacchi <rm@joyent.com> Author: Paul Dagnelie <pcd@delphix.com> illumos/illumos-gate@9a686fbc186e8e2a64e9a5094d44c7d6fa0ea167
* MFC r289527:mav2015-11-131-2/+0
| | | | | | | | | | | | | | 5561 support root pools on EFI/GPT partitioned disks 5125 update zpool/libzfs to manage bootable whole disk pools (EFI/GPT labeled disks) Reviewed by: Jean McCormack <jean.mccormack@nexenta.com> Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com> Approved by: Dan McDonald <danmcd@omniti.com> Author: Hans Rosenfeld <hans.rosenfeld@nexenta.com> illumos/illumos-gate@1a902ef8628b0dffd6df5442354ab59bb8530962 This is NOP changes for FreeBSD.
* MFC r289422:mav2015-11-1324-78/+650
| | | | | | | | | | | | | | | | | | 4185 add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com> Reviewed by: Richard Lowe <richlowe@richlowe.net> Approved by: Garrett D'Amore <garrett@damore.org> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@45818ee124adeaaf947698996b4f4c722afc6d1f This is only a partial merge of respective ZFS infrastructure changes. At this moment FreeBSD kernel has no those crypto algorithms, so the parts of the code to enable them are commented out. When they are implemented, it will be trivial to plug them in.
* MFC r289362, r289445: 2605 want to resume interrupted zfs sendmav2015-11-1315-163/+910
| | | | | | | | | | | | | | | | | | | | | | | | | Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed by: Xin Li <delphij@freebsd.org> Reviewed by: Arne Jansen <sensille@gmx.net> Approved by: Dan McDonald <danmcd@omniti.com> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@9c3fd1216fa7fb02cfbc78a2518a686d54b48ab8 For more info, see: - slides http://www.slideshare.net/MatthewAhrens/openzfs-send-and-receive - video https://www.youtube.com/watch?v=iY44jPMvxog - manpage changes (for zfs resume -s and zfs send -t) - upcoming talk at the OpenZFS Developer Summit The TL;DR is: Use "zfs receive -s" to save the partially received state on failure. On failure, get the receive token with "zfs get receive_resume_token <fs>" Resume the send with "zfs send -t <token_value>" Relnotes: yes
* MFC r289309: 6267 dn_bonus evicted too earlymav2015-11-135-43/+38
| | | | | | | | | | Reviewed by: Richard Yao <ryao@gentoo.org> Reviewed by: Xin LI <delphij@freebsd.org> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Approved by: Richard Lowe <richlowe@richlowe.net> Author: Justin T. Gibbs <gibbs@FreeBSD.org> illumos/illumos-gate@d2058105c61ec61df3a2dd3f839fed8c3fe7bfd6
* MFC r289307: 6295 metaslab_condense's dbgmsg should include vdev idmav2015-11-131-5/+6
| | | | | | | | | | | | Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Andriy Gapon <avg@freebsd.org> Reviewed by: Xin Li <delphij@freebsd.org> Reviewed by: Justin Gibbs <gibbs@scsiguy.com> Approved by: Richard Lowe <richlowe@richlowe.net> Author: Joe Stein <joe.stein@delphix.com> illumos/illumos-gate@daec38ecb4fb5e73e4ca9e99be84f6b8c50c02fa
* MFC r289305: 6293 ztest failure: error == 28 (0xc == 0x1c) in ztest_tx_assign()mav2015-11-131-0/+10
| | | | | | | | | | Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Approved by: Richard Lowe <richlowe@richlowe.net> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@8fe00bfb8790ad51653f67b01d5ac14256cbb404
* MFC r289299: 6286 ZFS internal error when set large block on bootfsmav2015-11-131-3/+3
| | | | | | | | | | Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Andriy Gapon <avg@FreeBSD.org> Approved by: Robert Mustacchi <rm@joyent.com> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@6de9bb5603e65b16816b7ab29e39bac820e2da2b
* MFC r289297: 6288 dmu_buf_will_dirty could be fastermav2015-11-131-10/+51
| | | | | | | | | | | Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: Justin Gibbs <gibbs@scsiguy.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@0f2e7d03b8f588387cb8dd8dd500cbe5ff4484e0
* MFC r289295: 5219 l2arc_write_buffers() may write beyond target_szmav2015-11-131-1/+3
| | | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Saso Kiselkov <skiselkov@gmail.com> Reviewed by: George Wilson <george@delphix.com> Reviewed by: Steven Hartland <steven.hartland@multiplay.co.uk> Reviewed by: Justin Gibbs <gibbs@FreeBSD.org> Approved by: Matthew Ahrens <mahrens@delphix.com> Author: Andriy Gapon <avg@freebsd.org> illumos/illumos-gate@d7d9a6d919f92d74ea0510a53f8441396048e800
* MFC r289192: 6281 prefetching should apply to 1MB readsmav2015-11-131-2/+2
| | | | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Reviewed by: Alexander Motin <mav@freebsd.org> Reviewed by: Dan McDonald <danmcd@omniti.com> Reviewed by: Justin Gibbs <gibbs@scsiguy.com> Reviewed by: Xin Li <delphij@freebsd.org> Approved by: Gordon Ross <gordon.ross@nexenta.com> Author: George Wilson <george.wilson@delphix.com> illumos/illumos-gate@632802744ef6d17e06d6980a95f631615c3b060f
* MFC r289191, r289194: 6251 add tunable to disable free_bpobj processingmav2015-11-131-2/+11
| | | | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Simon Klinkert <simon.klinkert@gmail.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed by: Albert Lee <trisk@omniti.com> Reviewed by: Xin Li <delphij@freebsd.org> Approved by: Garrett D'Amore <garrett@damore.org> Author: George Wilson <george.wilson@delphix.com> illumos/illumos-gate@139510fb6efa97dbe5f5479594b308d940cab8d1
* MFC r289190: 6250 zvol_dump_init() can hold txg openmav2015-11-131-44/+63
| | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Albert Lee <trisk@omniti.com> Reviewed by: Xin Li <delphij@freebsd.org> Approved by: Garrett D'Amore <garrett@damore.org> Author: George Wilson <george.wilson@delphix.com> illumos/illumos-gate@b10bba72460aeaa53119c76ff5e647fd5585bece
* MFC r287745: 5997 FRU field not set during pool creation and nevermav2015-11-133-6/+28
| | | | | | | | | | | | | | | | | | | | | | | | | updated ZFS already supports storing the vdev FRU in a vdev property. There is code in libzfs to work with this property, and there is code in the zfs-retire FMA module that looks for that information. But there is no code actually setting or updating the FRU. To address this, ZFS is changed to send a handful of new events whenever a vdev is added, attached, cleared, or onlined, as well as when a pool is created or imported. Note that syseventd is not currently available on FreeBSD and thus some work is needed to actually support the new ZFS events (e.g. in zfsd) to actually use this capability, this changeset is mostly a diff reduction from upstream. illumos/illumos-gate@1437283407f89cab03860accf49408f94559bc34 Illumos issues: 5997 FRU field not set during pool creation and never updated https://www.illumos.org/issues/5997
* MFC r290401 & r290466smh2015-11-121-1/+7
| | | | | | Provide information about bad DVA Sponsored by: Multiplay
* MFC r290399:smh2015-11-121-1/+1
| | | | | | Allow zfs_recover to be changed at runtime Sponsored by: Multiplay
* MFC r276450smh2015-11-051-1/+2
| | | | | | Correct zpool list displaying invalid EXPANDSZ for unavailable pool vdevs Sponsored by: Multiplay
* MFC r288363: std: it is important that func name is never an empty stringavg2015-10-231-0/+2
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* MFC r288340: define aok in libnvpair which is linked to all zfsavg2015-10-231-0/+8
| | | | libraries that need aok
* MFC r288362: sdt: start checking version field when parsing probe definitionsavg2015-10-231-0/+6
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* MFC r288365: sdt: static-ize couple of variablesavg2015-10-231-2/+2
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* MFC r288364: sdt module does not seem to actually use any symbol fromavg2015-10-231-1/+0
| | | | opensolaris module
* MFC r288361: dtrace_getarg: remove stray return statement on amd64, powerpcavg2015-10-232-2/+0
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* MFC r288204: MFV r288063:delphij2015-10-108-203/+171
| | | | make dataset property de-registration operation O(1)
* MFC r288579: Restore original array_rd_sz semantics.mav2015-10-051-1/+1
| | | | | | Before r278702 prefetch was blocked for I/Os > 1MB, after -- >= 1MB. 1MB I/Os are used for bulk operations in CTL (XCOPY, VERIFY), and disabling prefetch for them reduced the performance.
* MFC r288064 (by avg): 6220 memleak in l2arc on debug buildmav2015-10-031-0/+7
| | | | | | | | | | | | | illumos/illumos-gate/commit/c546f36aa898d913ff77674fb5ff97f15b2e08b4 https://www.illumos.org/issues/6220 5408 introduced a memleak in l2arc, namely the member b_thawed gets leaked when an arc_hdr is realloced from full to l2only. Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com> Reviewed by: Simon Klinkert <simon.klinkert@gmail.com> Reviewed by: George Wilson <george@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Arne Jansen <sensille@gmx.net>
* MFC r287744 (by delphij): Reduce diff against upstream.mav2015-10-031-0/+1
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* MFC r287706 (by delphij):mav2015-10-032-34/+14
| | | | | | | | | | | | | | | | | | | 6214 zpools going south In r286570 (MFV of r277426) an unprotected write to b_flags to set the compression mode was introduced. This would open a race window where data is partially decompressed, modified, checksummed and written to the pool, resulting in pool corruption due to the partial decompression. Prevent this by reintroducing b_compress illumos/illumos-gate@d4cd038c92c36fd0ae35945831a8fc2975b5272c Illumos issues: 6214 zpools going south https://www.illumos.org/issues/6214
* MFV r287703, r287705 (by delphij):mav2015-10-031-3/+7
| | | | | | | | | | | | | | 6091 avl_add doesn't assert on non-debug builds Use assfail() from libuutil instead of ASSERT() in userland AVL avl_add. illumos/illumos-gate@faa2b6be2fc102adf9ed584fc1a667b4ddf50d78 Illumos issues: 6091 avl_add doesn't assert on non-debug builds https://www.illumos.org/issues/6091
* MFC r287702: 5987 zfs prefetch code needs workmav2015-10-038-669/+268
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rewrite the ZFS prefetch code to detect only forward, sequential streams. The following kstats have been added: kstat.zfs.misc.arcstats.sync_wait_for_async How many sync reads have waited for async read to complete. (less is better) kstat.zfs.misc.arcstats.demand_hit_predictive_prefetch How many demand read didn't have to wait for I/O because of predictive prefetch. (more is better) zfetch kstats have been similified to hits, misses, and max_streams, with max_streams representing times when we were not able to create new stream because we already have the maximum number of sequences for a file. The sysctl variable/loader tunable vfs.zfs.zfetch.block_cap have been replaced by vfs.zfs.zfetch.max_distance, which controls maximum bytes to prefetch per stream. illumos/illumos-gate@cf6106c8a0d6598b045811f9650d66e07eb332af Illumos ZFS issues: 5987 zfs prefetch code needs work https://www.illumos.org/issues/5987
* MFC r287283 (by delphij):mav2015-10-031-8/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a buffer overrun which may lead to data corruption, introduced in r286951 by reinstating changes in r274628. In l2arc_compress_buf(), we allocate a buffer to stash away the compressed data in 'cdata', allocated of l2hdr->b_asize bytes. We then ask zio_compress_data() to compress the buffer, b_l1hdr.b_tmp_cdata, which is of l2hdr->b_asize bytes, and have the compressed size (or original size, if compress didn't gain enough) stored in csize. To pad the buffer to fit the optimal write size, we round up the compressed size to L2 device's vdev_ashift. Illumos code rounds up the size by at most SPA_MINBLOCKSIZE. Because we know csize <= b_asize, and b_asize is integer multiple of SPA_MINBLOCKSIZE, we are guaranteed that the rounded up csize would be <= b_asize. However, this is not necessarily true when we round up to 1 << vdev_ashift, because it could be larger than SPA_MINBLOCKSIZE. So, in the worst case scenario, we are overwriting at most (1 << vdev_ashift - SPA_MINBLOCKSIZE) bytes of memory next to the compressed data buffer. Andriy's original change in r274628 reorganized the code a little bit, by moving the padding to after we determined that the compression was beneficial. At which point, we would check rounded size against the allocated buffer size, and the buffer overrun would not be possible.
* MFC r287280 (by delphij):mav2015-10-031-2/+2
| | | | | | | | | | | In r286705 (Illumos 5960/a2cdcdd), a separate thread is created with curproc as parent. In the case of a send or receive, the curproc would be the userland application that issues the ioctl. This would trigger an assertion failure introduced in Solaris compatibility shims in r196458 when kernel is compiled with INVARIANTS. Fix this by using p0 (proc0 or kernel) as the parent thread when creating the kernel threads.
* MFC r287103 (by avg): 5692 expose the number of hole blocks in a filemav2015-10-033-14/+97
| | | | | | | | | | | | | | | | | | | | | | FreeBSD porting notes: - only kernel-side changes are merged - the new ioctl is not actually implemented yet - thus, the goal is to synchronize DMU code illumos/illumos-gate@2bcf0248e992f292c7b814458bcdce2f004925d6 https://www.illumos.org/issues/5692 we would like to expose the number of hole (sparse) blocks in a file. this can be useful to for example if you want to fill in the holes with some data; knowing the number of holes in advances allows you to report progress on hole filling. We could use SEEK_HOLE to do that but it would be O(n) where n is the number of holes present in the file. Author: Max Grossman <max.grossman@delphix.com> Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Boris Protopopov <bprotopopov@hotmail.com> Approved by: Richard Lowe <richlowe@richlowe.net>
* MFC r286983 (by avg):mav2015-10-031-1/+1
| | | | fix a mismerge in r286539 (MFV 286538: 5562 ZFS sa_handle's violate...)
* MFC r286951: Restore part of r274628, reverted at r286776.mav2015-10-031-1/+2
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* MFC r286776: Remove some random accumulated diff from Illumos.mav2015-10-031-19/+13
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* MFC r286774: 2618 arc.c mistypes in the commentsmav2015-10-031-3/+3
| | | | | | | | | Reviewed by: Jason King <jason.brian.king@gmail.com> Reviewed by: Josef Sipek <jeffpc@josefsipek.net> Approved by: Richard Lowe <richlowe@richlowe.net> Author: Bart Coddens <bart.coddens@gmail.com> illumos/illumos-gate@fc98fea58e89224f6f13d7fae246d6cb5dfa35ea
* MFC r286770: Fix r286766 build with debug.mav2015-10-031-6/+6
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* MFC r286767: Fix minor mismerge sometimes earlier.mav2015-10-031-4/+4
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* MFC r286766: 5817 change type of arcs_size from uint64_t to refcount_tmav2015-10-031-25/+108
| | | | | | | | | | | | | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com> Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Richard Elling <richard.elling@richardelling.com> Approved by: Garrett D'Amore <garrett@damore.org> Author: Prakash Surya <prakash.surya@delphix.com> illumos/illumos-gate@2fd872a734cf486007a8dba532cec52bfb4d40e5 As a way to make it more difficult to introduce bugs into the ARC, and to make it easier to diagnose issues when bugs do creep in, it would be beneficial to change the type of the arc_state_t's arcs_size field to be a refcount_t instead of a uint64_t. This would allow us to make stricter checks when incrementing and decrementing the value with debugging enabled, but still fallback to simple, fast atomic operations when debugging is disabled.
* MFC r286764: 6033 arc_adjust() should search MFU lists for oldest buffermav2015-10-031-2/+2
| | | | | | | | | | | | | | | | | | when adjusting MFU size. illumos/illumos-gate@31c46cf23cd1cf4d66390a983dc5072d7d299ba2 https://www.illumos.org/issues/6033 When we're looking for the list containing oldest buffer we never actually look at the MFU lists even when we try to evict from MFU. looks like a copy paste error, the fix is here: Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com> Reviewed by: Xin Li <delphij@delphij.net> Reviewed by: Prakash Surya <me@prakashsurya.com> Approved by: Matthew Ahrens <mahrens@delphix.com> Author: Alek Pinchuk <alek@nexenta.com> Obtained from: illumos
* MFC r286763: 5497 lock contention on arcs_mtxmav2015-10-037-638/+1624
| | | | | | | | | | | | | | | | Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Richard Elling <richard.elling@richardelling.com> Approved by: Dan McDonald <danmcd@omniti.com> Author: Prakash Surya <prakash.surya@delphix.com> illumos/illumos-gate@244781f10dcd82684fd8163c016540667842f203 This patch attempts to reduce lock contention on the current arc_state_t mutexes. These mutexes are used liberally to protect the number of LRU lists within the ARC (e.g. ARC_mru, ARC_mfu, etc). The granularity at which these locks are acquired has been shown to greatly affect the performance of highly concurrent, cached workloads.
* MFC r286762: Revert part of r205231, introducing multiple ARC state locks.mav2015-10-031-278/+148
| | | | | This local implementation will be replaced by one from Illumos to reduce code divergence and make further merges easier.
* Fix r288549 build on stable.mav2015-10-032-6/+1
| | | | For some reason this (odd) code builds on head, but not on stable.
* MFC r286712: 6096 ZFS_SMB_ACL_RENAME needs to cleanup bettermav2015-10-031-0/+1
| | | | | | | | | Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Gordon Ross <gordon.w.ross@gmail.com> Reviewed by: George Wilson <gwilson@zfsmail.com> Approved by: Robert Mustacchi <rm@joyent.com> illumos/illumos-gate@8f5190a540d64d2debee6664bbc740e4c38f5b7f
* MFC r286710:mav2015-10-031-2/+4
| | | | | | | | | | | | 6093 zfsctl_shares_lookup should only VN_RELE() on zfs_zget() success Reviewed by: Gordon Ross <gwr@nexenta.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Dan McDonald <danmcd@omniti.com> illumos/illumos-gate@0f92170f1ec2737ee5a0e51b5f74093904811452
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