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Subject[086/127] nommu: yield CPU while disposing VM
2.6.32-stable review patch.  If anyone has any objections, please let us know.

From: Steven J. Magnani <>

commit 04c3496152394d17e3bc2316f9731ee3e8a026bc upstream.

Depending on processor speed, page size, and the amount of memory a
process is allowed to amass, cleanup of a large VM may freeze the system
for many seconds. This can result in a watchdog timeout.

Make sure other tasks receive some service when cleaning up large VMs.

Signed-off-by: Steven J. Magnani <>
Cc: Greg Ungerer <>
Reviewed-by: KOSAKI Motohiro <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>
Signed-off-by: Greg Kroah-Hartman <>

mm/nommu.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1615,6 +1615,7 @@ void exit_mmap(struct mm_struct *mm)
mm->mmap = vma->vm_next;
delete_vma(mm, vma);
+ cond_resched();


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