path: root/mm
diff options
authorGlauber Costa <glommer@redhat.com>2008-11-19 15:36:33 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-19 18:49:58 -0800
commit0ae15132a4f5c758a6ffcde74495641dc3f62ba1 (patch)
treec81f885105a038aa694c700e4aec37377f640881 /mm
parent496850e5f5a372029ceb2b35c811770a9bb073b6 (diff)
mm: vmalloc search restart fix
Current vmalloc restart search for a free area in case we can't find one. The reason is there are areas which are lazily freed, and could be possibly freed now. However, current implementation start searching the tree from the last failing address, which is pretty much by definition at the end of address space. So, we fail. The proposal of this patch is to restart the search from the beginning of the requested vstart address. This fixes the regression in running KVM virtual machines for me, described in http://lkml.org/lkml/2008/10/28/349, caused by commit db64fe02258f1507e13fe5212a989922323685ce. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 04f5e320e74..30f826d484f 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -324,14 +324,14 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
BUG_ON(size & ~PAGE_MASK);
- addr = ALIGN(vstart, align);
va = kmalloc_node(sizeof(struct vmap_area),
gfp_mask & GFP_RECLAIM_MASK, node);
if (unlikely(!va))
return ERR_PTR(-ENOMEM);
+ addr = ALIGN(vstart, align);
/* XXX: could have a last_hole cache */
n = vmap_area_root.rb_node;