svn commit: r208903 - stable/8/sys/i386/i386

[Alan Cox]

Author: alc
Date: Tue Jun  8 04:41:31 2010
New Revision: 208903
URL: http://svn.freebsd.org/changeset/base/208903

Log:
  MFC r208765
    In the unlikely event that pmap_ts_referenced() demoted five superpage
    mappings to the same underlying physical page, the calling thread would
    be left forever pinned to the same processor.
  
  Approved by:	re (kib)

Modified:
  stable/8/sys/i386/i386/pmap.c

Modified: stable/8/sys/i386/i386/pmap.c
==============================================================================
--- stable/8/sys/i386/i386/pmap.c	Tue Jun  8 03:39:31 2010	(r208902)
+++ stable/8/sys/i386/i386/pmap.c	Tue Jun  8 04:41:31 2010	(r208903)
@@ -4461,7 +4461,7 @@ pmap_ts_referenced(vm_page_t m)
 					rtval++;
 					if (rtval > 4) {
 						PMAP_UNLOCK(pmap);
-						return (rtval);
+						goto out;
 					}
 				}
 			}
@@ -4490,6 +4490,7 @@ pmap_ts_referenced(vm_page_t m)
 			PMAP_UNLOCK(pmap);
 		} while ((pv = pvn) != NULL && pv != pvf);
 	}
+out:
 	sched_unpin();
 	return (rtval);
 }