svn commit: r254599 - head/sys/vm

[Alan Cox]

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) ||