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Illumos 5347 - idle pool may run itself out of space

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5347 idle pool may run itself out of space
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Steven Hartland <killing@multiplay.co.uk>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://github.com/illumos/illumos-gate/commit/231aab8
  https://github.com/illumos/illumos-gate/commit/4a92375 3642
  https://www.illumos.org/issues/5347
  https://github.com/zfsonlinux/zfs/commit/89b1cd6 (partial commit & fix)
  https://github.com/zfsonlinux/zfs/commit/fbeddd6 Illumos 4390
  https://github.com/zfsonlinux/zfs/commit/2696dfa Illumos 3642, 3643

Porting notes:
This is completing the partial fix from FreeBSD

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3586
This commit is contained in:
Matthew Ahrens
2015-07-11 02:19:41 +02:00
committed by Brian Behlendorf
parent 93f6d7e2e5
commit 905edb405d
4 changed files with 51 additions and 25 deletions
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module/zfs/dsl_scan.c
+7 -3
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@@ -1528,11 +1528,15 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
dp->dp_bptree_obj, tx));
dp->dp_bptree_obj = 0;
scn->scn_async_destroying = B_FALSE;
scn->scn_async_stalled = B_FALSE;
} else {
/*
* If we didn't make progress, mark the async destroy as
* stalled, so that we will not initiate a spa_sync() on
* its behalf.
* If we didn't make progress, mark the async
* destroy as stalled, so that we will not initiate
* a spa_sync() on its behalf. Note that we only
* check this if we are not finished, because if the
* bptree had no blocks for us to visit, we can
* finish without "making progress".
*/
scn->scn_async_stalled =
(scn->scn_visited_this_txg == 0);