Author: alc
Date: Wed Aug 21 15:31:43 2013
New Revision: 254599
URL: http://svnweb.freebsd.org/changeset/base/254599
Log:
Addendum to r254141: Allow recursion on the free pages queues lock in
vm_page_alloc_freelist().
Reported and tested by: sbruno
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/vm/vm_page.c
Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c Wed Aug 21 14:33:02 2013 (r254598)
+++ head/sys/vm/vm_page.c Wed Aug 21 15:31:43 2013 (r254599)
@@ -1927,7 +1927,7 @@ vm_page_alloc_freelist(int flind, int re
/*
* Do not allocate reserved pages unless the req has asked for it.
*/
- mtx_lock(&vm_page_queue_free_mtx);
+ mtx_lock_flags(&vm_page_queue_free_mtx, MTX_RECURSE);
if (cnt.v_free_count + cnt.v_cache_count > cnt.v_free_reserved ||
(req_class == VM_ALLOC_SYSTEM &&
cnt.v_free_count + cnt.v_cache_count > cnt.v_interrupt_free_min) ||
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