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From: Alan Cox <alc@FreeBSD.org>
Date: Mon, 19 Apr 2010 00:18:14 +0000 (UTC)
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Subject: svn commit: r206823 - head/sys/vm
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Author: alc
Date: Mon Apr 19 00:18:14 2010
New Revision: 206823
URL: http://svn.freebsd.org/changeset/base/206823

Log:
  vm_thread_swapout() can safely dirty the page before rather than after
  acquiring the page queues lock.

Modified:
  head/sys/vm/vm_glue.c

Modified: head/sys/vm/vm_glue.c
==============================================================================
--- head/sys/vm/vm_glue.c	Sun Apr 18 22:51:20 2010	(r206822)
+++ head/sys/vm/vm_glue.c	Mon Apr 19 00:18:14 2010	(r206823)
@@ -523,8 +523,8 @@ vm_thread_swapout(struct thread *td)
 		m = vm_page_lookup(ksobj, i);
 		if (m == NULL)
 			panic("vm_thread_swapout: kstack already missing?");
-		vm_page_lock_queues();
 		vm_page_dirty(m);
+		vm_page_lock_queues();
 		vm_page_unwire(m, 0);
 		vm_page_unlock_queues();
 	}