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| author | Steven J. Magnani <steve@digidescorp.com> | 2010-11-24 12:56:54 -0800 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-12-14 23:40:15 +0100 |
| commit | a28c2bb7f58fad804d4673eb37b7c0436b945f15 (patch) | |
| tree | e31f5e432b46a00b84262fd86ea9207dd46dbf53 /mm | |
| parent | 7e8d53c0fad544ddb5f62bb6faf836ec04256608 (diff) | |
| download | lwn-a28c2bb7f58fad804d4673eb37b7c0436b945f15.tar.gz lwn-a28c2bb7f58fad804d4673eb37b7c0436b945f15.zip | |
nommu: yield CPU while disposing VM
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 <steve@digidescorp.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/nommu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index e48b38c521e4..3e1854887418 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1673,6 +1673,7 @@ void exit_mmap(struct mm_struct *mm) mm->mmap = vma->vm_next; delete_vma_from_mm(vma); delete_vma(mm, vma); + cond_resched(); } kleave(""); |