Olaf Faaland 927f40d089 Record skipped MMP writes in multihost_history ... Once per pass through the MMP thread's loop, the vdev tree is walked to find a suitable leaf to write the next MMP block to. If no such leaf is found, the thread sleeps for a while and resumes at the top of the loop. Add an entry to multihost_history when no leaf can be found, and record the reason in the error column. The error code for such entries is a bitfield, displayed in hex: 0x1 At least one vdev (interior or leaf) was not writeable. 0x2 At least one writeable leaf vdev was found, but it had a pending MMP write. timestamp = the time in seconds since the epoch when no leaf could be found originally. duration = the time (in ns) during which no MMP block was written for this reason. This does not include the preceeding inter-write period nor the following inter-write period. vdev_guid = the number of sequential cycles of the MMP thread looop when this occurred. Sample output, truncated to fit: For records of skipped MMP writes the right-most column, vdev_path, is reported as "-". id txg timestamp error duration mmp_delay vdev_guid ... 936 11 1520036441 0 146264 891422313 1740883117838 ... 937 11 1520036441 0 163956 888356657 7320395061548 ... 938 11 1520036442 0 130690 885314969 7320395061548 ... 939 11 1520036442 0 2001068577 882296582 1740883117838 ... 940 11 1520036443 0 161806 882296582 7320395061548 ... 941 11 1520036443 0x2 0 998020546 1 ... 942 11 1520036444 0 136585 998020546 7320395061548 ... 943 11 1520036444 0x2 0 998020257 1 ... 944 11 1520036445 5 2002662964 994160219 1740883117838 ... 945 11 1520036445 0x2 998073118 994160219 3 ... 946 11 1520036447 0 247136 994160219 7320395061548 ... Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Olaf Faaland <faaland1@llnl.gov> Closes #7212		2018-05-07 17:19:56 -07:00
..
abd.c	Update for cppcheck v1.80	2018-01-30 10:27:31 -06:00
arc.c	Fix free memory calculation on v3.14+	2018-03-14 16:10:37 -07:00
blkptr.c	OpenZFS 8067 - zdb should be able to dump literal embedded block pointer	2017-07-07 11:28:01 -07:00
bplist.c	Change KM_PUSHPAGE -> KM_SLEEP	2015-01-16 14:41:26 -08:00
bpobj.c	Don't dirty bpobj if it has no entries	2017-05-26 11:42:10 -07:00
bptree.c	OpenZFS 7082 - bptree_iterate() passes wrong args to zfs_dbgmsg()	2017-01-17 14:49:24 -08:00
bqueue.c	Call cv_signal() with mutex held	2017-06-26 14:36:49 -07:00
dbuf_stats.c	Improved dnode allocation and dmu_hold_impl() (#6611)	2017-09-13 15:46:15 -07:00
dbuf.c	Fix ARC hit rate	2018-01-30 10:27:31 -06:00
ddt_zap.c	Change KM_PUSHPAGE -> KM_SLEEP	2015-01-16 14:41:26 -08:00
ddt.c	Cache ddt_get_dedup_dspace() value if there was no ddt changes	2016-12-02 16:59:35 -07:00
dmu_diff.c	OpenZFS 6950 - ARC should cache compressed data	2016-09-13 09:58:33 -07:00
dmu_object.c	Improved dnode allocation and dmu_hold_impl() (#6611)	2017-09-13 15:46:15 -07:00
dmu_objset.c	dmu_objset: release bonus buffer in failure path	2018-01-30 10:27:30 -06:00
dmu_send.c	Skip FREEOBJECTS for objects which can't exist	2017-10-16 10:57:55 -07:00
dmu_traverse.c	Fix zdb -c traverse stop on damaged objset root	2018-03-14 16:10:36 -07:00
dmu_tx.c	Call commit callbacks from the tail of the list	2018-01-30 10:27:31 -06:00
dmu_zfetch.c	OpenZFS 8835 - Speculative prefetch in ZFS not working for misaligned reads	2018-01-30 10:27:31 -06:00
dmu.c	Fix dirty check in dmu_offset_next()	2017-11-21 13:11:29 -06:00
dnode_sync.c	OpenZFS 7968 - multi-threaded spa_sync()	2017-03-20 18:36:00 -07:00
dnode.c	Improved dnode allocation and dmu_hold_impl() (#6611)	2017-09-13 15:46:15 -07:00
dsl_bookmark.c	OpenZFS 8377 - Panic in bookmark deletion	2017-06-30 11:11:01 -07:00
dsl_dataset.c	OpenZFS 7600 - zfs rollback should pass target snapshot to kernel	2017-07-04 15:29:52 -07:00
dsl_deadlist.c	OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()	2017-07-08 20:35:35 -07:00
dsl_deleg.c	Performance optimization of AVL tree comparator functions	2016-08-31 14:35:34 -07:00
dsl_destroy.c	OpenZFS 7254 - ztest failed assertion in ztest_dataset_dirobj_verify: dirobjs + 1 == usedobjs	2017-01-27 11:43:42 -08:00
dsl_dir.c	Reduce stack usage of dsl_dir_tempreserve_impl	2017-06-12 11:41:03 -07:00
dsl_pool.c	Multi-modifier protection (MMP)	2017-07-13 13:54:00 -04:00
dsl_prop.c	Fix dsl_props_set_sync_impl to work with nested nvlist	2016-12-20 18:46:59 -08:00
dsl_scan.c	OpenZFS 6939 - add sysevents to zfs core for commands	2017-07-12 21:28:13 -07:00
dsl_synctask.c	Illumos 4951 - ZFS administrative commands should use reserved space	2015-05-04 09:41:10 -07:00
dsl_userhold.c	OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()	2017-07-08 20:35:35 -07:00
edonr_zfs.c	DLPX-44812 integrate EP-220 large memory scalability	2016-11-29 14:34:27 -08:00
fm.c	Linux 4.14 compat: CONFIG_GCC_PLUGIN_RANDSTRUCT	2017-12-04 17:21:39 -08:00
gzip.c	GZIP compression offloading with QAT accelerator	2017-03-22 17:58:47 -07:00
lz4.c	Fix LZ4_uncompress_unknownOutputSize caused panic	2017-05-19 13:45:46 -07:00
lzjb.c	Change KM_PUSHPAGE -> KM_SLEEP	2015-01-16 14:41:26 -08:00
Makefile.in	Multi-modifier protection (MMP)	2017-07-13 13:54:00 -04:00
metaslab.c	OpenZFS 8023 - Panic destroying a metaslab deferred range tree	2017-04-09 16:12:35 -07:00
mmp.c	Record skipped MMP writes in multihost_history	2018-05-07 17:19:56 -07:00
multilist.c	OpenZFS 7968 - multi-threaded spa_sync()	2017-03-20 18:36:00 -07:00
pathname.c	Add pn_alloc()/pn_free() functions	2016-04-21 09:49:25 -07:00
policy.c	Take user namespaces into account in policy checks	2018-03-14 16:10:38 -07:00
qat_compress.c	Bug fix in qat_compress.c for vmalloc addr check	2018-03-14 16:10:36 -07:00
qat_compress.h	GZIP compression offloading with QAT accelerator	2017-03-22 17:58:47 -07:00
range_tree.c	Performance optimization of AVL tree comparator functions	2016-08-31 14:35:34 -07:00
refcount.c	Linux 4.11 compat: avoid refcount_t name conflict	2017-02-28 16:10:18 -08:00
rrwlock.c	Fix spelling	2017-01-03 11:31:18 -06:00
sa.c	OpenZFS 8061 - sa_find_idx_tab can be declared more type-safely	2017-04-14 11:11:28 -07:00
sha256.c	DLPX-44812 integrate EP-220 large memory scalability	2016-11-29 14:34:27 -08:00
skein_zfs.c	DLPX-44812 integrate EP-220 large memory scalability	2016-11-29 14:34:27 -08:00
spa_boot.c	Add linux kernel module support	2010-08-31 13:41:58 -07:00
spa_config.c	Remove vn_rename and vn_remove dependency	2018-03-14 16:10:36 -07:00
spa_errlog.c	OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()	2017-07-08 20:35:35 -07:00
spa_history.c	Emit history events for 'zpool create'	2017-12-04 17:21:03 -08:00
spa_misc.c	Multi-modifier protection (MMP)	2017-07-13 13:54:00 -04:00
spa_stats.c	Record skipped MMP writes in multihost_history	2018-05-07 17:19:56 -07:00
spa.c	Fix multihost stale cache file import	2017-12-18 10:31:01 -08:00
space_map.c	OpenZFS 8023 - Panic destroying a metaslab deferred range tree	2017-04-09 16:12:35 -07:00
space_reftree.c	OpenZFS 6328 - Fix cstyle errors in zfs codebase	2017-01-12 09:42:11 -08:00
trace.c	OpenZFS 6531 - Provide mechanism to artificially limit disk performance	2016-05-26 10:11:51 -07:00
txg.c	OpenZFS 8063 - verify that we do not attempt to access inactive txg	2017-05-10 13:52:22 -04:00
uberblock.c	Multi-modifier protection (MMP)	2017-07-13 13:54:00 -04:00
unique.c	Performance optimization of AVL tree comparator functions	2016-08-31 14:35:34 -07:00
vdev_cache.c	Fix wrong offset args in vdev_cache_write	2017-03-28 11:06:22 -07:00
vdev_disk.c	Linux 4.14 compat: IO acct, global_page_state, etc (#6655)	2017-09-19 14:24:34 -07:00
vdev_file.c	Skip spurious resilver IO on raidz vdev	2017-05-12 17:28:03 -07:00
vdev_label.c	Use linear abd in vdev_copy_uberblocks()	2017-10-16 10:57:55 -07:00
vdev_mirror.c	vdev_mirror: load balancing fixes	2018-01-30 10:27:30 -06:00
vdev_missing.c	Skip spurious resilver IO on raidz vdev	2017-05-12 17:28:03 -07:00
vdev_queue.c	vdev_mirror: load balancing fixes	2018-01-30 10:27:30 -06:00
vdev_raidz_math_aarch64_neon_common.h	ABD raidz NEON support	2016-11-29 14:34:33 -08:00
vdev_raidz_math_aarch64_neon.c	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
vdev_raidz_math_aarch64_neonx2.c	ABD raidz NEON support	2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx2.c	ABD raidz avx512f support	2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx512bw.c	ABD: Adapt avx512bw raidz assembly	2016-12-15 17:31:33 -08:00
vdev_raidz_math_avx512f.c	Use cstyle -cpP in make cstyle check	2016-12-12 10:46:26 -08:00
vdev_raidz_math_impl.h	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c	ABD Vectorized raidz	2016-11-29 14:34:33 -08:00
vdev_raidz_math_sse2.c	ABD raidz avx512f support	2016-11-29 14:34:33 -08:00
vdev_raidz_math_ssse3.c	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
vdev_raidz_math.c	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
vdev_raidz.c	Linux 4.14 compat: CONFIG_GCC_PLUGIN_RANDSTRUCT	2017-12-04 17:21:39 -08:00
vdev_root.c	Skip spurious resilver IO on raidz vdev	2017-05-12 17:28:03 -07:00
vdev.c	Change checksum & IO delay ratelimit values	2018-03-14 16:10:38 -07:00
zap_leaf.c	Revert "Handle zap_add() failures in mixed ... "	2018-04-09 17:29:59 -04:00
zap_micro.c	Revert "Handle zap_add() failures in mixed ... "	2018-04-09 17:29:59 -04:00
zap.c	Revert "Handle zap_add() failures in mixed ... "	2018-04-09 17:29:59 -04:00
zfeature_common.c	OpenZFS 2932 - support crash dumps to raidz, etc. pools	2017-04-10 10:24:17 -07:00
zfeature.c	OpenZFS 6328 - Fix cstyle errors in zfs codebase	2017-01-12 09:42:11 -08:00
zfs_acl.c	OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common contains a use after end of the lifetime of a local variable	2018-03-14 16:10:36 -07:00
zfs_byteswap.c	Add linux kernel module support	2010-08-31 13:41:58 -07:00
zfs_ctldir.c	Linux 4.9 compat: fix zfs_ctldir xattr handling	2017-06-05 11:26:25 -07:00
zfs_debug.c	Add line info and SET_ERROR() to ZFS debug log	2017-07-25 23:09:48 -07:00
zfs_dir.c	Revert "Handle zap_add() failures in mixed ... "	2018-04-09 17:29:59 -04:00
zfs_fm.c	OpenZFS 6939 - add sysevents to zfs core for commands	2017-07-12 21:28:13 -07:00
zfs_fuid.c	Rename zfs_sb_t -> zfsvfs_t	2017-03-10 09:51:33 -08:00
zfs_ioctl.c	Fix zfs_ioc_pool_sync should not use fnvlist	2018-01-30 10:27:30 -06:00
zfs_log.c	OpenZFS 7578 - Fix/improve some aspects of ZIL writing	2017-06-09 09:15:37 -07:00
zfs_onexit.c	zfsdev_getminor() should check for invalid file handles	2015-06-22 17:02:13 -07:00
zfs_replay.c	Rename zfs_sb_t -> zfsvfs_t	2017-03-10 09:51:33 -08:00
zfs_rlock.c	Fix spelling	2017-01-03 11:31:18 -06:00
zfs_sa.c	Modifying XATTRs doesnt change the ctime	2017-09-13 16:05:18 -07:00
zfs_vfsops.c	Revert "Long hold the dataset during upgrade"	2017-12-06 13:25:40 -06:00
zfs_vnops.c	Revert "Handle zap_add() failures in mixed ... "	2018-04-09 17:29:59 -04:00
zfs_znode.c	Fix dnode allocation race	2017-08-08 10:17:33 -07:00
zil.c	Increment zil_itx_needcopy_bytes properly	2018-03-14 16:10:38 -07:00
zio_checksum.c	Remove dependency on linear ABD	2017-03-29 12:24:51 -07:00
zio_compress.c	DLPX-44812 integrate EP-220 large memory scalability	2016-11-29 14:34:27 -08:00
zio_inject.c	Inject zinject(8) a percentage amount of dev errs	2017-06-16 17:21:11 -07:00
zio.c	OpenZFS 8857 - zio_remove_child() panic due to already destroyed parent zio	2018-03-14 16:10:37 -07:00
zle.c	Fix zle_decompress out of bound access	2018-03-14 16:10:36 -07:00
zpl_ctldir.c	Linux 4.12 compat: CURRENT_TIME removed	2017-05-10 09:30:48 -07:00
zpl_export.c	Use cstyle -cpP in make cstyle check	2016-12-12 10:46:26 -08:00
zpl_file.c	Rename zfs_sb_t -> zfsvfs_t	2017-03-10 09:51:33 -08:00
zpl_inode.c	Linux 4.12 compat: CURRENT_TIME removed	2017-05-10 09:30:48 -07:00
zpl_super.c	Linux 4.16 compat: inode_set_iversion()	2018-03-14 16:10:36 -07:00
zpl_xattr.c	Update for cppcheck v1.80	2018-01-30 10:27:31 -06:00
zrlock.c	OpenZFS 3746 - ZRLs are racy	2017-01-23 10:35:58 -08:00
zvol.c	Linux 4.16 compat: get_disk_and_module()	2018-03-14 16:10:38 -07:00