Re: [PATCH 15/17] mm: Do not use unnecessary atomic operations when adding pages to the LRU

[Mel Gorman]

On Thu, May 01, 2014 at 09:33:40AM -0400, Johannes Weiner wrote:
> On Thu, May 01, 2014 at 09:44:46AM +0100, Mel Gorman wrote:
> > When adding pages to the LRU we clear the active bit unconditionally. As the
> > page could be reachable from other paths we cannot use unlocked operations
> > without risk of corruption such as a parallel mark_page_accessed. This
> > patch test if is necessary to clear the atomic flag before using an atomic
> > operation. In the unlikely even this races with mark_page_accesssed the
> 
>                              event
> 

Will be corrected in v3. Thanks.

-- 
Mel Gorman
SUSE Labs
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