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From: Wu Fengguang <fengguang.wu@intel.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox <willy@linux.intel.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Li Shaohua <shaohua.li@intel.com>, Rik van Riel <riel@redhat.com>
Subject: Re: [TESTCASE] Clean pages clogging the VM
Date: Thu, 19 Aug 2010 05:26:13 +0800	[thread overview]
Message-ID: <20100818212613.GA7366@localhost> (raw)
In-Reply-To: <20100818141308.GD1779@cmpxchg.org>

> Mapped file pages get two rounds on the LRU list, so once the VM
> starts scanning, it has to go through all of them twice and can only
> reclaim them on the second encounter.

This can be fixed gracefully based on Rik's refault-distance patch :)
With the distance info we can safely drop the use-once mapped file pages.

Thanks,
Fengguang

WARNING: multiple messages have this Message-ID (diff)
From: Wu Fengguang <fengguang.wu@intel.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox <willy@linux.intel.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Li Shaohua <shaohua.li@intel.com>, Rik van Riel <riel@redhat.com>
Subject: Re: [TESTCASE] Clean pages clogging the VM
Date: Thu, 19 Aug 2010 05:26:13 +0800	[thread overview]
Message-ID: <20100818212613.GA7366@localhost> (raw)
In-Reply-To: <20100818141308.GD1779@cmpxchg.org>

> Mapped file pages get two rounds on the LRU list, so once the VM
> starts scanning, it has to go through all of them twice and can only
> reclaim them on the second encounter.

This can be fixed gracefully based on Rik's refault-distance patch :)
With the distance info we can safely drop the use-once mapped file pages.

Thanks,
Fengguang

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  parent reply	other threads:[~2010-08-18 21:26 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-09 13:30 [TESTCASE] Clean pages clogging the VM Matthew Wilcox
2010-08-17 19:50 ` Matthew Wilcox
2010-08-17 19:50   ` Matthew Wilcox
2010-08-18 14:13   ` Johannes Weiner
2010-08-18 14:13     ` Johannes Weiner
     [not found]     ` <20100818160613.GE9431@localhost>
2010-08-18 16:07       ` Wu Fengguang
2010-08-18 16:07         ` Wu Fengguang
2010-08-19  1:42         ` Shaohua Li
2010-08-19  1:42           ` Shaohua Li
2010-08-19 11:51         ` Johannes Weiner
2010-08-19 11:51           ` Johannes Weiner
2010-08-19 21:09           ` Wu Fengguang
2010-08-19 21:09             ` Wu Fengguang
2010-08-20  5:05           ` Shaohua Li
2010-08-20  5:05             ` Shaohua Li
2010-08-18 21:26     ` Wu Fengguang [this message]
2010-08-18 21:26       ` Wu Fengguang
2010-08-19  9:18     ` KOSAKI Motohiro
2010-08-19  9:18       ` KOSAKI Motohiro

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