Re: [PATCH] vmscan: add barrier to prevent evictable page in unevictable list
From: Lin Ming <hidden>
Date: 2011-09-29 01:02:56
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On Thu, Sep 29, 2011 at 2:05 AM, Minchan Kim [off-list ref] wrote:
On Wed, Sep 28, 2011 at 11:04:05PM +0800, Lin Ming wrote:quoted
On Wed, Sep 28, 2011 at 9:45 AM, Minchan Kim [off-list ref] wrote:quoted
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.
I was confused. Now I understand.
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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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