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Serialize ZTHR operations to eliminate races

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Adds a new lock for serializing operations on zthrs.
The commit also includes some code cleanup and
refactoring.

Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #8229
This commit is contained in:
Serapheim Dimitropoulos
2019-01-13 10:09:46 -08:00
committed by Brian Behlendorf
parent 83c796c5e9
commit 61c3391acc
7 changed files with 192 additions and 130 deletions
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module/zfs/spa_checkpoint.c
+2 -4
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@@ -393,7 +393,7 @@ spa_checkpoint_discard_thread_check(void *arg, zthr_t *zthr)
return (B_TRUE);
}
int
void
spa_checkpoint_discard_thread(void *arg, zthr_t *zthr)
{
spa_t *spa = arg;
@@ -408,7 +408,7 @@ spa_checkpoint_discard_thread(void *arg, zthr_t *zthr)
dmu_buf_t **dbp;
if (zthr_iscancelled(zthr))
return (0);
return;
ASSERT3P(vd->vdev_ops, !=, &vdev_indirect_ops);
@@ -445,8 +445,6 @@ spa_checkpoint_discard_thread(void *arg, zthr_t *zthr)
VERIFY0(dsl_sync_task(spa->spa_name, NULL,
spa_checkpoint_discard_complete_sync, spa,
0, ZFS_SPACE_CHECK_NONE));
return (0);
}