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ZFS: Make deadman tunables no longer read-only

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This allows the user to enable, disable, and adjust the I/O deadman at
runtime. This can be especially useful when a pool is backed by remote
storage (such as iscsi, ggated, etc).

PR:		221906
Submitted by:	Fabian Keil <fk@fabiankeil.de>
Obtained from:	ElectroBSD
MFC after:	1 week
Sponsored by:	Klara Systems
Event:		Waterloo Hackathon 2019
This commit is contained in:
Allan Jude 2019-05-21 21:26:18 +00:00
parent 45d314c556
commit 4e7d8292ec
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348068
1 changed files with 3 additions and 3 deletions
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6
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c
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@ -363,13 +363,13 @@ SYSCTL_PROC(_vfs_zfs, OID_AUTO, debugflags,
CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RWTUN, 0, sizeof(int),
sysctl_vfs_zfs_debug_flags, "IU", "Debug flags for ZFS testing.");
SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_synctime_ms, CTLFLAG_RDTUN,
SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_synctime_ms, CTLFLAG_RWTUN,
&zfs_deadman_synctime_ms, 0,
"Stalled ZFS I/O expiration time in milliseconds");
SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_checktime_ms, CTLFLAG_RDTUN,
SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_checktime_ms, CTLFLAG_RwTUN,
&zfs_deadman_checktime_ms, 0,
"Period of checks for stalled ZFS I/O in milliseconds");
SYSCTL_INT(_vfs_zfs, OID_AUTO, deadman_enabled, CTLFLAG_RDTUN,
SYSCTL_INT(_vfs_zfs, OID_AUTO, deadman_enabled, CTLFLAG_RWTUN,
&zfs_deadman_enabled, 0, "Kernel panic on stalled ZFS I/O");
SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_asize_inflation, CTLFLAG_RWTUN,
&spa_asize_inflation, 0, "Worst case inflation factor for single sector writes");