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Commit 04c34961 authored by Steven J. Magnani's avatar Steven J. Magnani Committed by Linus Torvalds
Browse files

nommu: yield CPU while disposing VM 



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: default avatarSteven J. Magnani <steve@digidescorp.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Reviewed-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3a3a1af3

mm/nommu.c

+1 −0
Original line number Diff line number Diff line
@@ -1717,6 +1717,7 @@ void exit_mmap(struct mm_struct *mm) 
		mm->mmap = vma->vm_next;

		delete_vma_from_mm(vma);

		delete_vma(mm, vma);

		cond_resched();

	}



	kleave("");