From ad12695f177c3403a64348b42718faf9727fe358 Mon Sep 17 00:00:00 2001
From: Andrea Arcangeli <aarcange@redhat.com>
Date: Thu, 5 Nov 2015 18:49:07 -0800
Subject: ksm: add cond_resched() to the rmap_walks

While at it add it to the file and anon walks too.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Petr Holasek <pholasek@redhat.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/ksm.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'mm/ksm.c')

diff --git a/mm/ksm.c b/mm/ksm.c
index 7ee101eaacdf..e87dec7ba950 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1914,9 +1914,11 @@ again:
 		struct anon_vma_chain *vmac;
 		struct vm_area_struct *vma;
 
+		cond_resched();
 		anon_vma_lock_read(anon_vma);
 		anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root,
 					       0, ULONG_MAX) {
+			cond_resched();
 			vma = vmac->vma;
 			if (rmap_item->address < vma->vm_start ||
 			    rmap_item->address >= vma->vm_end)
-- 
cgit