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Emit an error message before MMP suspends pool 

In mmp_thread(), emit an MMP specific error message before calling
zio_suspend() so that the administrator will understand why the pool
is being suspended.

Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Closes #7048
This commit is contained in:
John L. Hammond 2018-01-17 14:24:42 -06:00 committed by Brian Behlendorf
parent 43cb30b3ce
commit 51d1b58ef3
1 changed files with 5 additions and 0 deletions
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5
module/zfs/mmp.c
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@ -26,6 +26,7 @@
#include <sys/mmp.h> #include <sys/mmp.h>
#include <sys/spa.h> #include <sys/spa.h>
#include <sys/spa_impl.h> #include <sys/spa_impl.h>
#include <sys/time.h>
#include <sys/vdev.h> #include <sys/vdev.h>
#include <sys/vdev_impl.h> #include <sys/vdev_impl.h>
#include <sys/zfs_context.h> #include <sys/zfs_context.h>
@ -429,6 +430,10 @@ mmp_thread(void *arg)
*/ */
if (!suspended && mmp_fail_intervals && multihost && if (!suspended && mmp_fail_intervals && multihost &&
(start - mmp->mmp_last_write) > max_fail_ns) { (start - mmp->mmp_last_write) > max_fail_ns) {
cmn_err(CE_WARN, "MMP writes to pool '%s' have not "
"succeeded in over %llus; suspending pool",
spa_name(spa),
NSEC2SEC(start - mmp->mmp_last_write));
zio_suspend(spa, NULL); zio_suspend(spa, NULL);
} }