Re: [PATCH] vmscan: add barrier to prevent evictable page inunevictable list

[Minchan Kim]

On Wed, Sep 28, 2011 at 11:04:05PM +0800, Lin Ming wrote:
> On Wed, Sep 28, 2011 at 9:45 AM, Minchan Kim <minchan.kim@xxxxxxxxx> wrote:
> > When racing between putback_lru_page and shmem_unlock happens,
> 
> s/shmem_unlock/shmem_lock/

I did it intentionally for represent shmem_lock with user = 1, lock = 0.
If you think it makes others confusing, I will change in next version.
Thanks.

> 
> > progrom execution order is as follows, but clear_bit in processor #1
> > could be reordered right before spin_unlock of processor #1.
> > Then, the page would be stranded on the unevictable list.

-- 
Kind regards,
Minchan Kim
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