Brian Behlendorf 9dcb971983 Log I/Os longer than zio_delay_max (30s default) ... There have been reports of ZFS deadlocking due to what appears to be a lost IO. This patch addes some debugging to determine the exact state of the IO which neither 1) completed, 2) failed, or 3) timed out after zio_delay_max (30) seconds. This information will be logged using the ZFS FMA infrastructure as a 'delay' event and posted to the internal zevent log. By default the last 64 events will be kept in the log but the limit is configurable via the zfs_zevent_len_max module option. To dump the contents of the log use the 'zpool events -v' command and look for the resource.fs.zfs.delay event. It will include various information about the pool, vdev, and zio which may shed some light on the issue. In the context of this change the 120 second kernel blocked thread watchdog has been disabled for synchronous IOs. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #930		2012-11-02 15:45:59 -07:00
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fm	Log I/Os longer than zio_delay_max (30s default)	2012-11-02 15:45:59 -07:00
fs	Illumos #2703: add mechanism to report ZFS send progress	2012-09-19 13:39:06 -07:00
arc.h	Fix zfs_write_limit_max integer size mismatch on 32-bit systems	2012-10-11 11:09:25 -07:00
avl_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
avl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
bplist.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
bpobj.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dbuf.h	Switch KM_SLEEP to KM_PUSHPAGE	2012-08-27 12:01:37 -07:00
ddt.h	Add ddt_object_count() error handling	2012-10-29 08:57:45 -07:00
dmu_impl.h	Illumos #2703: add mechanism to report ZFS send progress	2012-09-19 13:39:06 -07:00
dmu_objset.h	Illumos #3100: zvol rename fails with EBUSY when dirty.	2012-10-03 13:59:02 -07:00
dmu_traverse.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dmu_tx.h	Add --enable-debug-dmu-tx configure option	2012-03-23 12:25:17 -07:00
dmu_zfetch.h	Add missing ZFS tunables	2011-05-04 10:02:37 -07:00
dmu.h	Illumos #2703: add mechanism to report ZFS send progress	2012-09-19 13:39:06 -07:00
dnode.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_dataset.h	Illumos #3100: zvol rename fails with EBUSY when dirty.	2012-10-03 13:59:02 -07:00
dsl_deadlist.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_deleg.h	Illumos #1644, #1645, #1646, #1647, #1708	2012-07-31 09:25:30 -07:00
dsl_dir.h	Switch KM_SLEEP to KM_PUSHPAGE	2012-08-27 12:01:37 -07:00
dsl_pool.h	Add txgs-<pool> kstat file	2012-11-02 15:45:56 -07:00
dsl_prop.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_scan.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
dsl_synctask.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
efi_partition.h	Move partition scanning from userspace to module.	2012-07-17 09:17:31 -07:00
Makefile.am	Add .zfs control directory	2012-03-22 13:03:47 -07:00
metaslab_impl.h	Add FASTWRITE algorithm for synchronous writes.	2012-10-17 08:56:41 -07:00
metaslab.h	Add FASTWRITE algorithm for synchronous writes.	2012-10-17 08:56:41 -07:00
nvpair_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
nvpair.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
refcount.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
rrwlock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
sa_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
sa.h	Add sa_spill_rele() interface	2012-03-07 16:28:00 -08:00
spa_boot.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
spa_impl.h	Illumos #1693: persistent 'comment' field for a zpool	2012-08-08 11:49:37 -07:00
spa.h	Switch KM_SLEEP to KM_PUSHPAGE	2012-08-27 12:01:37 -07:00
space_map.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
txg_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
txg.h	Fix zfs_txg_timeout module parameter	2012-10-11 15:07:09 -07:00
u8_textprep_data.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
u8_textprep.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uberblock_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uberblock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uio_impl.h	Add basic uio support	2011-02-10 09:21:43 -08:00
unique.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
uuid.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
vdev_disk.h	Linux 2.6.x compat, blkdev_compat.h	2011-02-23 12:29:38 -08:00
vdev_file.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
vdev_impl.h	Add FASTWRITE algorithm for synchronous writes.	2012-10-17 08:56:41 -07:00
vdev.h	Illumos #1949, #1953	2012-07-11 13:33:31 -07:00
xvattr.h	Add xvattr support	2011-03-02 11:43:50 -08:00
zap_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zap_leaf.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zap.h	Export symbols for the full ZAP API	2011-09-27 16:12:36 -07:00
zfs_acl.h	Fix build failures on PaX/GRSecurity patched kernels	2012-07-17 09:22:43 -07:00
zfs_context.h	Fix VOP_CLOSE() in userspace.	2012-10-03 13:32:48 -07:00
zfs_ctldir.h	Use ULL suffix in constants	2012-07-10 11:31:55 -07:00
zfs_debug.h	Cleanly support debug packages	2012-02-27 14:08:17 -08:00
zfs_dir.h	Prototype/structure update for Linux	2011-02-10 09:27:21 -08:00
zfs_fuid.h	Prototype/structure update for Linux	2011-02-10 09:27:21 -08:00
zfs_ioctl.h	Speed up 'zfs list -t snapshot -o name -s name'	2012-06-14 09:49:04 -07:00
zfs_onexit.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zfs_rlock.h	Range lock performance improvements	2011-03-08 12:44:06 -08:00
zfs_sa.h	Implement SA based xattrs	2011-11-28 15:45:51 -08:00
zfs_stat.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zfs_vfsops.h	Add .zfs control directory	2012-03-22 13:03:47 -07:00
zfs_vnops.h	Cleanup mmap(2) writes	2011-08-02 10:34:55 -07:00
zfs_znode.h	Add .zfs control directory	2012-03-22 13:03:47 -07:00
zil_impl.h	Add FASTWRITE algorithm for synchronous writes.	2012-10-17 08:56:41 -07:00
zil.h	Add ZIL statistics.	2012-06-29 09:56:51 -07:00
zio_checksum.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio_compress.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio_impl.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zio.h	Add FASTWRITE algorithm for synchronous writes.	2012-10-17 08:56:41 -07:00
zpl.h	Linux 3.3 compat, iops->create()/mkdir()/mknod()	2012-04-30 12:52:38 -07:00
zrlock.h	Support custom build directories and move includes	2010-09-08 12:38:56 -07:00
zvol.h	Linux 2.6.x compat, blkdev_compat.h	2011-02-23 12:29:38 -08:00