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mirror_zfs/module/zfs
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George.Wilson cc92e9d0c3 3246 ZFS I/O deadman thread 
Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Reviewed by: Christopher Siden <chris.siden@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

NOTES: This patch has been reworked from the original in the
following ways to accomidate Linux ZFS implementation

*) Usage of the cyclic interface was replaced by the delayed taskq
   interface.  This avoids the need to implement new compatibility
   code and allows us to rely on the existing taskq implementation.

*) An extern for zfs_txg_synctime_ms was added to sys/dsl_pool.h
   because declaring externs in source files as was done in the
   original patch is just plain wrong.

*) Instead of panicing the system when the deadman triggers a
   zevent describing the blocked vdev and the first pending I/O
   is posted.  If the panic behavior is desired Linux provides
   other generic methods to panic the system when threads are
   observed to hang.

*) For reference, to delay zios by 30 seconds for testing you can
   use zinject as follows: 'zinject -d <vdev> -D30 <pool>'

References:
  illumos/illumos-gate@283b84606b
  https://www.illumos.org/issues/3246

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1396
2013-05-01 17:05:52 -07:00
..
arc.c Constify structures containing function pointers 2013-03-04 08:49:32 -08:00
bplist.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
bpobj.c Illumos #3104: eliminate empty bpobjs 2013-01-08 10:35:43 -08:00
bptree.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dbuf.c Illumos #3145, #3212 2013-01-08 10:35:44 -08:00
ddt_zap.c Add ddt_object_count() error handling 2012-10-29 08:57:45 -07:00
ddt.c Add zio_ddt_free()+ddt_phys_decref() error handling 2013-03-19 13:01:01 -07:00
dmu_diff.c Update to onnv_147 2010-08-26 14:24:34 -07:00
dmu_object.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
dmu_objset.c Switch KM_SLEEP to KM_PUSHPAGE 2013-02-06 11:19:58 -08:00
dmu_send.c Cast 'zfs bad bloc' to ULL for x86 2013-02-04 16:39:08 -08:00
dmu_traverse.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dmu_tx.c Illumos #3422, #3425 2013-04-12 09:01:36 -07:00
dmu_zfetch.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
dmu.c Illumos #3086: unnecessarily setting DS_FLAG_INCONSISTENT on async 2013-01-08 10:35:43 -08:00
dnode_sync.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dnode.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dsl_dataset.c Use dsl_dataset_snap_lookup() 2013-01-25 15:07:40 -08:00
dsl_deadlist.c Illumos #3104: eliminate empty bpobjs 2013-01-08 10:35:43 -08:00
dsl_deleg.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dsl_dir.c Switch KM_SLEEP to KM_PUSHPAGE 2013-02-06 11:19:58 -08:00
dsl_pool.c Fix txg_quiesce thread deadlock 2013-04-26 14:42:36 -07:00
dsl_prop.c Switch KM_SLEEP to KM_PUSHPAGE 2012-09-17 11:22:23 -07:00
dsl_scan.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
dsl_synctask.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
fm.c Condition variable usage, zevent_cv 2012-10-15 16:01:54 -07:00
gzip.c Fix zmod.h usage in userspace 2010-08-31 08:38:46 -07:00
lz4.c Linux 3.9 compat: Undefine GCC_VERSION 2013-03-06 15:48:48 -08:00
lzjb.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
Makefile.in Illumos #3035 LZ4 compression support in ZFS and GRUB 2013-01-29 09:28:20 -08:00
metaslab.c Add metaslab_debug option 2013-03-18 16:47:43 -07:00
refcount.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
rrwlock.c Enable rrwlock.c compilation 2010-12-07 16:05:25 -08:00
sa.c Constify structures containing function pointers 2013-03-04 08:49:32 -08:00
sha256.c Add linux sha2 support 2010-08-31 13:41:59 -07:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_config.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
spa_errlog.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_history.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
spa_misc.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
spa.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
space_map.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
txg.c Fix txg_quiesce thread deadlock 2013-04-26 14:42:36 -07:00
uberblock.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
unique.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
vdev_cache.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
vdev_disk.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
vdev_file.c Illumos #1948: zpool list should show more detailed pool info 2012-09-19 13:39:05 -07:00
vdev_label.c Illumos #3090 and #3102 2013-01-08 10:35:42 -08:00
vdev_mirror.c Illumos #1948: zpool list should show more detailed pool info 2012-09-19 13:39:05 -07:00
vdev_missing.c Illumos #1948: zpool list should show more detailed pool info 2012-09-19 13:39:05 -07:00
vdev_queue.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
vdev_raidz.c Illumos #1948: zpool list should show more detailed pool info 2012-09-19 13:39:05 -07:00
vdev_root.c Illumos #1948: zpool list should show more detailed pool info 2012-09-19 13:39:05 -07:00
vdev.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
zap_leaf.c Switch KM_SLEEP to KM_PUSHPAGE 2012-09-05 08:44:58 -07:00
zap_micro.c Illumos #2619 and #2747 2013-01-08 10:35:35 -08:00
zap.c fzap_cursor_move_to_key() should drop l_rwlock 2013-01-23 16:31:16 -08:00
zfeature_common.c Illumos #3035 LZ4 compression support in ZFS and GRUB 2013-01-29 09:28:20 -08:00
zfeature.c Illumos #3104: eliminate empty bpobjs 2013-01-08 10:35:43 -08:00
zfs_acl.c Avoid gcc -Werror=maybe-uninitialized warnings 2013-01-28 09:10:29 -08:00
zfs_byteswap.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_ctldir.c Use dsl_dataset_snap_lookup() 2013-01-25 15:07:40 -08:00
zfs_debug.c Use spl_debug_* helpers 2012-02-09 16:37:48 -08:00
zfs_dir.c Trivial spelling fix 2013-04-19 15:43:16 -07:00
zfs_fm.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
zfs_fuid.c Drop HAVE_XVATTR macros 2011-03-02 11:44:34 -08:00
zfs_ioctl.c Add snapdev=[hidden|visible] dataset property 2013-03-05 12:37:54 -08:00
zfs_log.c Revert "Remove TSD zfs_fsyncer_key" 2012-12-20 09:56:28 -08:00
zfs_onexit.c Add linux kernel device support 2010-08-31 13:41:50 -07:00
zfs_replay.c Constify structures containing function pointers 2013-03-04 08:49:32 -08:00
zfs_rlock.c Switch KM_SLEEP to KM_PUSHPAGE 2012-12-10 09:44:45 -08:00
zfs_sa.c Revert "Use SA_HDL_PRIVATE for SA xattrs" 2012-08-25 09:25:56 -07:00
zfs_vfsops.c Use sb->s_d_op default dentry operations 2013-01-18 15:04:23 -08:00
zfs_vnops.c Revert "Remove TSD zfs_fsyncer_key" 2012-12-20 09:56:28 -08:00
zfs_znode.c Fix 'zfs rollback' on mounted file systems 2013-01-17 09:51:20 -08:00
zil.c Constify structures containing function pointers 2013-03-04 08:49:32 -08:00
zio_checksum.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zio_compress.c Illumos #3035 LZ4 compression support in ZFS and GRUB 2013-01-29 09:28:20 -08:00
zio_inject.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
zio.c 3246 ZFS I/O deadman thread 2013-05-01 17:05:52 -07:00
zle.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zpl_ctldir.c Add d_clear_d_op() compatibility 2013-01-23 16:33:29 -08:00
zpl_export.c Implement .commit_metadata hook for NFS export 2012-10-03 10:49:45 -07:00
zpl_file.c Remove .readdir from zpl_file_operations table 2013-04-19 15:36:47 -07:00
zpl_inode.c Add explicit MAXNAMELEN check 2013-02-12 10:27:39 -08:00
zpl_super.c Update SAs when an inode is dirtied 2012-12-14 12:18:54 -08:00
zpl_xattr.c Correctly return ERANGE in getxattr(2) 2013-04-24 12:35:04 -07:00
zrlock.c Export ZFS symbols needed by Lustre. 2010-09-17 16:24:15 -07:00
zvol.c Add snapdev=[hidden|visible] dataset property 2013-03-05 12:37:54 -08:00