MFC r316921: 8027 tighten up dsl_pool_dirty_delta
illumos/illumos-gate@313ae1e182
313ae1e182
https://www.illumos.org/issues/8027
dsl_pool_dirty_delta() should not wake up waiters when dp->dp_dirty_total ==
zfs_dirty_data_max, because they wait for dp_dirty_total to fall strictly below
the threshold.
It's probably very rare for that condition to occur, but it's better to have
more accurate code.
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Author: Andriy Gapon <avg@FreeBSD.org>
MFC after: 1 week
This commit is contained in:
commit
9fe5e04dfc
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=318830
@ -559,7 +559,7 @@ dsl_pool_dirty_delta(dsl_pool_t *dp, int64_t delta)
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* Note: we signal even when increasing dp_dirty_total.
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* This ensures forward progress -- each thread wakes the next waiter.
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*/
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if (dp->dp_dirty_total <= zfs_dirty_data_max)
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if (dp->dp_dirty_total < zfs_dirty_data_max)
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cv_signal(&dp->dp_spaceavail_cv);
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}
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