From: Vincent Li <macli@brc.ubc.ca>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH] [for mmotm-1113] mm: Simplify try_to_unmap_one()
Date: Wed, 18 Nov 2009 21:27:57 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.00.0911182108260.15866@kernalhack.brc.ubc.ca> (raw)
In-Reply-To: <20091119100525.3E2B.A69D9226@jp.fujitsu.com>
Hi KOSAKI,
Thank you for the comment, I am still little confused with the last
sentence.
On Thu, 19 Nov 2009, KOSAKI Motohiro wrote:
>
> +
> + /*
> + * We need mmap_sem locking, Otherwise VM_LOCKED check makes
> + * unstable result and race. Plus, We can't wait here because
> + * we now hold anon_vma->lock or mapping->i_mmap_lock.
> + * If trylock failed, The page remain evictable lru and
> + * retry to more unevictable lru by later vmscan.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I am having
trouble to undestand it. Yeah, I should read more code, but the sentence
itself make me confused :).
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next prev parent reply other threads:[~2009-11-19 5:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-17 8:39 KOSAKI Motohiro
2009-11-18 16:34 ` Hugh Dickins
2009-11-18 23:18 ` Andrew Morton
2009-11-19 1:23 ` KOSAKI Motohiro
2009-11-19 5:27 ` Vincent Li [this message]
2009-11-19 5:49 ` KOSAKI Motohiro
2009-11-19 6:14 ` Vincent Li
2009-11-19 6:28 ` KOSAKI Motohiro
2009-11-19 7:11 ` Vincent Li
2009-12-04 8:29 ` KOSAKI Motohiro
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