diff options
| author | Alex Reece <[email protected]> | 2014-07-18 07:08:31 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2014-09-23 13:50:55 -0700 |
| commit | acbad6ff6768b0ccfb3c319e981ec211dcecc277 (patch) | |
| tree | 3a17414f6a30247ce3dcc0488da07e7905e8894a /module/zfs/spa_misc.c | |
| parent | 1f6f97f3049706aa7ca95636fd587ae5f3d531a9 (diff) | |
Illumos 4753 - increase number of outstanding async writes when sync task is waiting
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Adam Leventhal <[email protected]>
Reviewed by: Christopher Siden <[email protected]>
Reviewed by: Dan McDonald <[email protected]>
Approved by: Garrett D'Amore <[email protected]>
References:
https://www.illumos.org/issues/4753
https://github.com/illumos/illumos-gate/commit/73527f4
Comments by Matt Ahrens from the issue tracker:
When a sync task is waiting for a txg to complete, we should hurry
it along by increasing the number of outstanding async writes
(i.e. make vdev_queue_max_async_writes() return a larger number).
Initially we might just have a tunable for "minimum async writes
while a synctask is waiting" and set it to 3.
Ported-by: Tim Chase <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #2716
Diffstat (limited to 'module/zfs/spa_misc.c')
| -rw-r--r-- | module/zfs/spa_misc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c index 1bed90027..abe313de4 100644 --- a/module/zfs/spa_misc.c +++ b/module/zfs/spa_misc.c @@ -1756,6 +1756,16 @@ spa_writeable(spa_t *spa) return (!!(spa->spa_mode & FWRITE)); } +/* + * Returns true if there is a pending sync task in any of the current + * syncing txg, the current quiescing txg, or the current open txg. + */ +boolean_t +spa_has_pending_synctask(spa_t *spa) +{ + return (!txg_all_lists_empty(&spa->spa_dsl_pool->dp_sync_tasks)); +} + int spa_mode(spa_t *spa) { |