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From: "Aubrey Li" <aubreylee@gmail.com>
To: "Vaidyanathan Srinivasan" <svaidy@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	"Linus Torvalds" <torvalds@osdl.org>,
	"Andrew Morton" <akpm@osdl.org>,
	"Nick Piggin" <nickpiggin@yahoo.com.au>,
	"linux-os (Dick Johnson)" <linux-os@analogic.com>,
	"Robin Getz" <rgetz@blackfin.uclinux.org>
Subject: Re: [RPC][PATCH 2.6.20-rc5] limit total vfs page cache
Date: Sat, 20 Jan 2007 00:05:01 +0800	[thread overview]
Message-ID: <6d6a94c50701190805saa0c7bbgbc59d2251bed8537@mail.gmail.com> (raw)
In-Reply-To: <45B0DB45.4070004@linux.vnet.ibm.com>

On 1/19/07, Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> wrote:
>
>
> Hi Aubrey,
>
> The idea of creating separate flag for pagecache in page_alloc is
> interesting.  The good part is that you flag watermark low and the
> zone reclaimer will do the rest of the job.
>
> However when the zone reclaimer starts to reclaim pages, it will
> remove all cold pages and not specifically pagecache pages.  This
> may affect performance of applications.
>
> One possible solution to this reclaim is to use scan control fields
> and ask the shrink_page_list() and shrink_active_list() routines to
> target only pagecache pages.  Pagecache pages are not mapped and
> they are easy to find on the LRU list.
>
> Please review my patch at http://lkml.org/lkml/2007/01/17/96
>

So you mean the existing reclaimer has the same issue, doesn't it?
In your and Roy's patch, balance_pagecache() routine is called on file
backed access.
So you still want to add this checking? or change the current
reclaimer completely?

-Aubrey

WARNING: multiple messages have this Message-ID (diff)
From: "Aubrey Li" <aubreylee@gmail.com>
To: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
	Nick Piggin <nickpiggin@yahoo.com.au>,
	"linux-os (Dick Johnson)" <linux-os@analogic.com>,
	Robin Getz <rgetz@blackfin.uclinux.org>
Subject: Re: [RPC][PATCH 2.6.20-rc5] limit total vfs page cache
Date: Sat, 20 Jan 2007 00:05:01 +0800	[thread overview]
Message-ID: <6d6a94c50701190805saa0c7bbgbc59d2251bed8537@mail.gmail.com> (raw)
In-Reply-To: <45B0DB45.4070004@linux.vnet.ibm.com>

On 1/19/07, Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> wrote:
>
>
> Hi Aubrey,
>
> The idea of creating separate flag for pagecache in page_alloc is
> interesting.  The good part is that you flag watermark low and the
> zone reclaimer will do the rest of the job.
>
> However when the zone reclaimer starts to reclaim pages, it will
> remove all cold pages and not specifically pagecache pages.  This
> may affect performance of applications.
>
> One possible solution to this reclaim is to use scan control fields
> and ask the shrink_page_list() and shrink_active_list() routines to
> target only pagecache pages.  Pagecache pages are not mapped and
> they are easy to find on the LRU list.
>
> Please review my patch at http://lkml.org/lkml/2007/01/17/96
>

So you mean the existing reclaimer has the same issue, doesn't it?
In your and Roy's patch, balance_pagecache() routine is called on file
backed access.
So you still want to add this checking? or change the current
reclaimer completely?

-Aubrey

--
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  reply	other threads:[~2007-01-19 16:05 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-18  3:23 [RPC][PATCH 2.6.20-rc5] limit total vfs page cache Aubrey Li
2007-01-18  3:23 ` Aubrey Li
2007-01-19 14:44 ` Vaidyanathan Srinivasan
2007-01-19 14:44   ` Vaidyanathan Srinivasan
2007-01-19 15:40   ` Aubrey Li
2007-01-19 15:40     ` Aubrey Li
2007-01-24  5:30     ` Vaidyanathan Srinivasan
2007-01-24  5:30       ` Vaidyanathan Srinivasan
2007-01-24  5:53       ` Aubrey Li
2007-01-24  5:53         ` Aubrey Li
2007-01-19 14:52 ` Vaidyanathan Srinivasan
2007-01-19 14:52   ` Vaidyanathan Srinivasan
2007-01-19 16:05   ` Aubrey Li [this message]
2007-01-19 16:05     ` Aubrey Li
2007-01-19 18:49     ` Vaidyanathan Srinivasan
2007-01-19 18:49       ` Vaidyanathan Srinivasan
2007-01-19 19:01       ` Christoph Lameter
2007-01-19 19:01         ` Christoph Lameter
2007-01-20  2:04       ` Aubrey Li
2007-01-20  2:04         ` Aubrey Li
2007-01-20  2:24         ` Nick Piggin
2007-01-20  2:24           ` Nick Piggin
2007-01-20  2:35           ` Mike Frysinger
2007-01-20  2:35             ` Mike Frysinger
2007-01-20  2:49             ` Nick Piggin
2007-01-20  2:49               ` Nick Piggin
2007-01-20  3:40               ` Mike Frysinger
2007-01-20  3:40                 ` Mike Frysinger
2007-01-20  3:08           ` Aubrey Li
2007-01-20  3:08             ` Aubrey Li
2007-01-20  4:03             ` Nick Piggin
2007-01-20  4:03               ` Nick Piggin
2007-01-20  4:26               ` Aubrey Li
2007-01-20  4:26                 ` Aubrey Li
2007-01-22 19:22                 ` Christoph Lameter
2007-01-22 19:22                   ` Christoph Lameter
2007-01-22 19:15               ` Christoph Lameter
2007-01-22 19:15                 ` Christoph Lameter
2007-01-19 18:21 ` Christoph Lameter
2007-01-19 18:21   ` Christoph Lameter

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