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OpenZFS 9280 - Assertion failure while running removal_with_ganging test with 4K devices

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Authored by: Matt Ahrens <Matt.Ahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Approved by: Garrett D'Amore <garrett@damore.org>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://www.illumos.org/issues/9280
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/243952c
Closes #7445
This commit is contained in:
Matt Ahrens
2017-07-24 11:07:39 -07:00
committed by Brian Behlendorf
parent d68ac65eb6
commit d830d4795a
4 changed files with 32 additions and 18 deletions
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module/zfs/metaslab.c
+7 -5
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@@ -48,8 +48,10 @@
*/
unsigned long metaslab_aliquot = 512 << 10;
/* force gang blocks */
unsigned long metaslab_gang_bang = SPA_MAXBLOCKSIZE + 1;
/*
* For testing, make some blocks above a certain size be gang blocks.
*/
unsigned long metaslab_force_ganging = SPA_MAXBLOCKSIZE + 1;
/*
* The in-core space map representation is more compact than its on-disk form.
@@ -2952,7 +2954,7 @@ metaslab_alloc_dva(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
/*
* For testing, make some blocks above a certain size be gang blocks.
*/
if (psize >= metaslab_gang_bang && (ddi_get_lbolt() & 3) == 0) {
if (psize >= metaslab_force_ganging && (ddi_get_lbolt() & 3) == 0) {
metaslab_trace_add(zal, NULL, NULL, psize, d, TRACE_FORCE_GANG);
return (SET_ERROR(ENOSPC));
}
@@ -3900,7 +3902,7 @@ MODULE_PARM_DESC(zfs_metaslab_switch_threshold,
"segment-based metaslab selection maximum buckets before switching");
/* CSTYLED */
module_param(metaslab_gang_bang, ulong, 0644);
MODULE_PARM_DESC(metaslab_gang_bang,
module_param(metaslab_force_ganging, ulong, 0644);
MODULE_PARM_DESC(metaslab_force_ganging,
"blocks larger than this size are forced to be gang blocks");
#endif /* _KERNEL && HAVE_SPL */