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Do not initiate MMP writes while pool is suspended 

While the pool is suspended on host A, it may be imported on host B.
If host A continued to write MMP blocks, it would be blindly
overwriting MMP blocks written by host B, and the blocks written by
host A would have outdated txg information.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes #7182
This commit is contained in:
Olaf Faaland 2018-02-22 09:14:46 -08:00 committed by Brian Behlendorf
parent a5369b61a2
commit 0d398b2564
1 changed files with 1 additions and 1 deletions
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2
module/zfs/mmp.c
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@ -438,7 +438,7 @@ mmp_thread(void *arg)
zio_suspend(spa, NULL); zio_suspend(spa, NULL);
} }
if (multihost) if (multihost && !suspended)
mmp_write_uberblock(spa); mmp_write_uberblock(spa);
CALLB_CPR_SAFE_BEGIN(&cpr); CALLB_CPR_SAFE_BEGIN(&cpr);