Re: [PATCH] ksm: Fix unlocked iteration over vmas in cmp_and_merge_page()

2017-09-13 Thread Andrea Arcangeli
On Wed, Sep 13, 2017 at 01:25:09PM +0200, Michal Hocko wrote: > [CC Claudio and Hugh] Cc'ed Sioh as well. > > On Mon 11-09-17 14:05:05, Kirill Tkhai wrote: > > In this place mm is unlocked, so vmas or list may change. > > Down read mmap_sem to protect them from modifications. > > > > Signed-off

Re: [PATCH] ksm: Fix unlocked iteration over vmas in cmp_and_merge_page()

2017-09-13 Thread Michal Hocko
[CC Claudio and Hugh] On Mon 11-09-17 14:05:05, Kirill Tkhai wrote: > In this place mm is unlocked, so vmas or list may change. > Down read mmap_sem to protect them from modifications. > > Signed-off-by: Kirill Tkhai > (and compile-tested-by) Fixes: e86c59b1b12d ("mm/ksm: improve deduplication