From: Minchan Kim <minchan.kim@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Minchan Kim <minchan.kim@gmail.com>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Lee Schermerhorn <lee.schermerhorn@hp.com>
Subject: Re: [PATCH] Check PageActive when evictable page and unevicetable page race happen
Date: Sun, 24 Apr 2011 14:37:12 +0900 [thread overview]
Message-ID: <BANLkTinW7+14b-DSK80-3ujdgVjTbZ4KCQ@mail.gmail.com> (raw)
In-Reply-To: <1303604751-4980-1-git-send-email-minchan.kim@gmail.com>
On Sun, Apr 24, 2011 at 9:25 AM, Minchan Kim <minchan.kim@gmail.com> wrote:
> In putback_lru_page, unevictable page can be changed into evictable
> 's one while we move it among lru. So we have checked it again and
> rescued it. But we don't check PageActive, again. It could add
> active page into inactive list so we can see the BUG in isolate_lru_pages.
> (But I didn't see any report because I think it's very subtle)
>
> It could happen in race that zap_pte_range's mark_page_accessed and
> putback_lru_page. It's subtle but could be possible.
Please Ignore this. I was confused.
The race never happens.
--
Kind regards,
Minchan Kim
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prev parent reply other threads:[~2011-04-24 5:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-24 0:25 [PATCH] Check PageActive when evictable page and unevicetable page race happen Minchan Kim
2011-04-24 2:01 ` Minchan Kim
2011-04-24 3:02 ` KOSAKI Motohiro
2011-04-24 5:50 ` Minchan Kim
2011-04-24 5:37 ` Minchan Kim [this message]
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