Author: alc
Date: Tue Jun 8 04:48:36 2010
New Revision: 208904
URL: http://svn.freebsd.org/changeset/base/208904
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.
Modified:
stable/7/sys/i386/i386/pmap.c
Modified: stable/7/sys/i386/i386/pmap.c
==============================================================================
--- stable/7/sys/i386/i386/pmap.c Tue Jun 8 04:41:31 2010
(r208903)
+++ stable/7/sys/i386/i386/pmap.c Tue Jun 8 04:48:36 2010
(r208904)
@@ -4408,7 +4408,7 @@ pmap_ts_referenced(vm_page_t m)
rtval++;
if (rtval > 4) {
PMAP_UNLOCK(pmap);
- return (rtval);
+ goto out;
}
}
}
@@ -4437,6 +4437,7 @@ pmap_ts_referenced(vm_page_t m)
PMAP_UNLOCK(pmap);
} while ((pv = pvn) != NULL && pv != pvf);
}
+out:
sched_unpin();
return (rtval);
}
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