svn commit: r233530 - head/sys/powerpc/aim
Nathan Whitehorn
nwhitehorn at FreeBSD.org
Tue Mar 27 01:26:01 UTC 2012
Author: nwhitehorn
Date: Tue Mar 27 01:26:00 2012
New Revision: 233530
URL: http://svn.freebsd.org/changeset/base/233530
Log:
Make sure to call vm_page_dirty() before the pmap lock is released to
prevent a race where another process could conclude the page was clean.
Submitted by: alc
Modified:
head/sys/powerpc/aim/mmu_oea64.c
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Tue Mar 27 01:24:18 2012 (r233529)
+++ head/sys/powerpc/aim/mmu_oea64.c Tue Mar 27 01:26:00 2012 (r233530)
@@ -1582,11 +1582,11 @@ moea64_remove_write(mmu_t mmu, vm_page_t
isync();
}
}
+ if ((lo & LPTE_CHG) != 0)
+ vm_page_dirty(m);
PMAP_UNLOCK(pmap);
}
UNLOCK_TABLE_RD();
- if ((lo & LPTE_CHG) != 0)
- vm_page_dirty(m);
vm_page_aflag_clear(m, PGA_WRITEABLE);
}
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