Author: kib
Date: Fri Oct 20 08:25:49 2017
New Revision: 324793
URL: https://svnweb.freebsd.org/changeset/base/324793
Log:
In vm_page_free_phys_pglist(), do not take vm_page_queue_free_mtx if
there is nothing to do.
Suggested by: mjg
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/vm/vm_page.c
Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c Fri Oct 20 08:20:15 2017 (r324792)
+++ head/sys/vm/vm_page.c Fri Oct 20 08:25:49 2017 (r324793)
@@ -2857,6 +2857,8 @@ vm_page_free_phys_pglist(struct pglist *tq)
{
vm_page_t m;
+ if (TAILQ_EMPTY(tq))
+ return;
mtx_lock(&vm_page_queue_free_mtx);
TAILQ_FOREACH(m, tq, listq)
vm_page_free_phys(m);
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