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34e143323e
mirror_zfs/module/zfs
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Brian Behlendorf 34e143323e Fix z_wr_iss_h zio_execute() import hang 
Because we need to be more frugal about our stack usage under
Linux.  The __zio_execute() function was modified to re-dispatch
zios to a ZIO_TASKQ_ISSUE thread when we're in a context which
is known to be stack heavy.  Those two contexts are the sync
thread and what ever thread is performing spa initialization.

Unfortunately, this change introduced an unlikely bug which can
result in a zio being re-dispatched indefinitely and never being
executed.  If during spa initialization we handle a zio with
ZIO_PRIORITY_NOW it will be moved to the high priority queue.
When __zio_execute() is called again for the zio it will mis-
interpret the context and re-dispatch it again.  The system
will get stuck spinning re-dispatching the zio and making no
forward progress.

To fix this rare issue __zio_execute() has been updated not
to re-dispatch zios on either the ZIO_TASKQ_ISSUE or
ZIO_TASKQ_ISSUE_HIGH task queues.

In practice this issue was rarely reported and can usually
be fixed by rebooting the system and importing the pool again.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1455
2013-08-15 15:20:36 -07:00
..
arc.c Evict meta data from ghost lists + l2arc headers 2013-08-09 10:06:12 -07:00
bplist.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
bpobj.c Illumos #3006 2013-06-19 15:14:10 -07:00
bptree.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
dbuf.c Illumos #3137 L2ARC compression 2013-08-08 13:27:21 -07:00
ddt_zap.c Add ddt_object_count() error handling 2012-10-29 08:57:45 -07:00
ddt.c Fix incorrect assertions in ddt_phys_decref and ddt_sync_entry 2013-05-06 14:10:55 -07:00
dmu_diff.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
dmu_object.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
dmu_objset.c Illumos #3137 L2ARC compression 2013-08-08 13:27:21 -07:00
dmu_send.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
dmu_traverse.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
dmu_tx.c dmu_tx: Fix possible NULL pointer dereference 2013-08-01 09:48:07 -07:00
dmu_zfetch.c Switch KM_SLEEP to KM_PUSHPAGE 2012-08-27 12:01:37 -07:00
dmu.c Illumos #3137 L2ARC compression 2013-08-08 13:27:21 -07:00
dnode_sync.c Illumos #3006 2013-06-19 15:14:10 -07:00
dnode.c Illumos #3006 2013-06-19 15:14:10 -07:00
dsl_dataset.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
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 Illumos #3006 2013-06-19 15:14:10 -07:00
dsl_pool.c Add new kstat for monitoring time in dmu_tx_assign 2013-07-11 13:53:44 -07:00
dsl_prop.c Switch KM_SLEEP to KM_PUSHPAGE 2012-09-17 11:22:23 -07:00
dsl_scan.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
dsl_synctask.c Illumos #3006 2013-06-19 15:14:10 -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 Illumos #3552, #3564 2013-06-19 16:22:39 -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 #3639 zpool.cache should skip over readonly pools 2013-08-07 16:13:56 -07:00
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 Illumos #3329, #3330, #3331, #3335 2013-05-06 12:39:34 -07:00
spa.c Call zvol_create_minors() in spa_open_common() when initializing pool 2013-07-03 09:22:44 -07:00
space_map.c Illumos #3552, #3564 2013-06-19 16:22:39 -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 Use GFP_NOIO in vdev_disk_io_flush() 2013-07-10 14:12:21 -07:00
vdev_file.c Illumos #3581 spa_zio_taskq[ZIO_TYPE_FREE][ZIO_TASKQ_ISSUE]->tq_lock contention 2013-05-06 14:05:37 -07:00
vdev_label.c Illumos #3090 and #3102 2013-01-08 10:35:42 -08:00
vdev_mirror.c Improve N-way mirror performance 2013-07-11 13:53:50 -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 Illumos #3618 ::zio dcmd does not show timestamp data 2013-08-12 16:46:50 -07:00
vdev_raidz.c Illumos #3006 2013-06-19 15:14:10 -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 Illumos #3618 ::zio dcmd does not show timestamp data 2013-08-12 16:46:50 -07:00
zap_leaf.c Switch KM_SLEEP to KM_PUSHPAGE 2012-09-05 08:44:58 -07:00
zap_micro.c Illumos #3006 2013-06-19 15:14:10 -07:00
zap.c Illumos #3006 2013-06-19 15:14:10 -07:00
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 Linux 3.8 compat: Support CONFIG_UIDGID_STRICT_TYPE_CHECKS 2013-08-09 15:31:52 -07:00
zfs_debug.c Illumos #3006 2013-06-19 15:14:10 -07:00
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 Call zvol_create_minors() in spa_open_common() when initializing pool 2013-07-03 09:22:44 -07:00
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 Illumos #3006 2013-06-19 15:14:10 -07:00
zfs_sa.c Revert "Use SA_HDL_PRIVATE for SA xattrs" 2012-08-25 09:25:56 -07:00
zfs_vfsops.c Fix read-only pool hang on unmount 2013-07-17 09:22:23 -07:00
zfs_vnops.c Return correct type and offset from zfs_readdir 2013-08-07 16:16:43 -07:00
zfs_znode.c Linux 3.8 compat: Support CONFIG_UIDGID_STRICT_TYPE_CHECKS 2013-08-09 15:31:52 -07:00
zil.c Illumos #3498 panic in arc_read() 2013-07-02 13:34:31 -07:00
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 Fix z_wr_iss_h zio_execute() import hang 2013-08-15 15:20:36 -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 Write dirty inodes on close 2013-08-07 16:11:19 -07:00
zpl_inode.c Linux 3.8 compat: Support CONFIG_UIDGID_STRICT_TYPE_CHECKS 2013-08-09 15:31:52 -07:00
zpl_super.c Fix arc_adapt() spinning in iterate_supers_type() 2013-07-17 09:28:06 -07:00
zpl_xattr.c Only check directory xattr on ENOENT 2013-05-10 12:24:56 -07:00
zrlock.c Export ZFS symbols needed by Lustre. 2010-09-17 16:24:15 -07:00
zvol.c 3.10 API change: block_device_operations->release() returns void 2013-07-08 15:41:57 -07:00