Author: markj
Date: Wed Jul 20 01:01:50 2016
New Revision: 303059
URL: https://svnweb.freebsd.org/changeset/base/303059
Log:
Release the second critical section in uma_zfree_arg() slightly earlier.
It is only needed when removing a full bucket from the per-CPU cache. The
bucket cache (uz_buckets) is protected by the zone mutex and thus the
critical section can be released before inserting into that list.
MFC after: 1 week
Modified:
head/sys/vm/uma_core.c
Modified: head/sys/vm/uma_core.c
==============================================================================
--- head/sys/vm/uma_core.c Wed Jul 20 00:53:21 2016 (r303058)
+++ head/sys/vm/uma_core.c Wed Jul 20 01:01:50 2016 (r303059)
@@ -2744,6 +2744,8 @@ zfree_start:
goto zfree_start;
}
cache->uc_freebucket = NULL;
+ /* We are no longer associated with this CPU. */
+ critical_exit();
/* Can we throw this on the zone full list? */
if (bucket != NULL) {
@@ -2756,9 +2758,6 @@ zfree_start:
LIST_INSERT_HEAD(&zone->uz_buckets, bucket, ub_link);
}
- /* We are no longer associated with this CPU. */
- critical_exit();
-
/*
* We bump the uz count when the cache size is insufficient to
* handle the working set.
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