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From: Kip Macy <kmacy@FreeBSD.org>
Date: Mon, 19 Apr 2010 19:25:17 +0000 (UTC)
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Subject: svn commit: r206855 - user/kmacy/head_page_lock_2/sys/vm
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Author: kmacy
Date: Mon Apr 19 19:25:17 2010
New Revision: 206855
URL: http://svn.freebsd.org/changeset/base/206855

Log:
  per 206823:
  vm_thread_swapout() can safely dirty the page before rather than after
   acquiring the page queues lock.

Modified:
  user/kmacy/head_page_lock_2/sys/vm/vm_glue.c

Modified: user/kmacy/head_page_lock_2/sys/vm/vm_glue.c
==============================================================================
--- user/kmacy/head_page_lock_2/sys/vm/vm_glue.c	Mon Apr 19 19:20:36 2010	(r206854)
+++ user/kmacy/head_page_lock_2/sys/vm/vm_glue.c	Mon Apr 19 19:25:17 2010	(r206855)
@@ -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(m);
 		vm_page_dirty(m);
+		vm_page_lock(m);
 		vm_page_unwire(m, 0);
 		vm_page_unlock(m);
 	}