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From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC 7/7] Switch of PF_MEMALLOC during writeout
Date: Tue, 21 Aug 2007 03:13:13 +0200	[thread overview]
Message-ID: <20070821011313.GA23935@one.firstfloor.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0708201618060.32662@schroedinger.engr.sgi.com>

> Right. I am not sure exactly how to handle that. There is also the issue 
> of the writes being deferred. I thought maybe of using pdflush to writeout 
> the pages? Maybe increase priority of the pdflush so that it runs 
> immediately when notified. Shrink_page_list would gather the dirty pages 
> in pvecs and then forward to a pdflush. That may make the whole thing much 
> cleaner.

Not sure anything complicated is needed.

You could just add another process flag and set PF_MEMALLOC on the first
recursion?

-Andi

WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC 7/7] Switch of PF_MEMALLOC during writeout
Date: Tue, 21 Aug 2007 03:13:13 +0200	[thread overview]
Message-ID: <20070821011313.GA23935@one.firstfloor.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0708201618060.32662@schroedinger.engr.sgi.com>

> Right. I am not sure exactly how to handle that. There is also the issue 
> of the writes being deferred. I thought maybe of using pdflush to writeout 
> the pages? Maybe increase priority of the pdflush so that it runs 
> immediately when notified. Shrink_page_list would gather the dirty pages 
> in pvecs and then forward to a pdflush. That may make the whole thing much 
> cleaner.

Not sure anything complicated is needed.

You could just add another process flag and set PF_MEMALLOC on the first
recursion?

-Andi

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  reply	other threads:[~2007-08-21  1:13 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-20 21:50 [RFC 0/7] Postphone reclaim laundry to write at high water marks Christoph Lameter
2007-08-20 21:50 ` Christoph Lameter
2007-08-20 21:50 ` [RFC 1/7] release_lru_pages(): Generic release of pages to the LRU Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-21 14:52   ` Mel Gorman
2007-08-21 14:52     ` Mel Gorman
2007-08-21 20:51     ` Christoph Lameter
2007-08-21 20:51       ` Christoph Lameter
2007-08-20 21:50 ` [RFC 2/7] Move checks from pageout() to shrink_page_list Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-20 21:50 ` [RFC 3/7] shrink_page_list: Support isolating dirty pages on laundry list Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-21 15:04   ` Mel Gorman
2007-08-21 15:04     ` Mel Gorman
2007-08-21 20:53     ` Christoph Lameter
2007-08-21 20:53       ` Christoph Lameter
2007-08-20 21:50 ` [RFC 4/7] Pass laundry through shrink_inactive_list() and shrink_zone() Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-20 21:50 ` [RFC 5/7] Laundry handling for direct reclaim Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-21 15:06   ` Mel Gorman
2007-08-21 15:06     ` Mel Gorman
2007-08-21 20:55     ` Christoph Lameter
2007-08-21 20:55       ` Christoph Lameter
2007-08-21 15:19   ` Mel Gorman
2007-08-21 15:19     ` Mel Gorman
2007-08-21 21:00     ` Christoph Lameter
2007-08-21 21:00       ` Christoph Lameter
2007-08-20 21:50 ` [RFC 6/7] kswapd: Do laundry after reclaim Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-20 21:50 ` [RFC 7/7] Switch of PF_MEMALLOC during writeout Christoph Lameter
2007-08-20 21:50   ` Christoph Lameter
2007-08-20 23:08   ` Andi Kleen
2007-08-20 23:08     ` Andi Kleen
2007-08-20 23:19     ` Christoph Lameter
2007-08-20 23:19       ` Christoph Lameter
2007-08-21  1:13       ` Andi Kleen [this message]
2007-08-21  1:13         ` Andi Kleen
2007-08-21 10:36 ` [RFC 0/7] Postphone reclaim laundry to write at high water marks Peter Zijlstra
2007-08-21 10:36   ` Peter Zijlstra
2007-08-21 20:48   ` Christoph Lameter
2007-08-21 20:48     ` Christoph Lameter
2007-08-21 21:13     ` Peter Zijlstra
2007-08-21 21:13       ` Peter Zijlstra
2007-08-21 21:29       ` Christoph Lameter
2007-08-21 21:29         ` Christoph Lameter
2007-08-21 21:43         ` Rik van Riel
2007-08-21 21:43           ` Rik van Riel
2007-08-21 22:32           ` Christoph Lameter
2007-08-21 22:32             ` Christoph Lameter
2007-08-23 12:05             ` Andrea Arcangeli
2007-08-23 12:05               ` Andrea Arcangeli
2007-08-23 20:23               ` Christoph Lameter
2007-08-23 20:23                 ` Christoph Lameter
2007-08-21 22:09         ` Peter Zijlstra
2007-08-21 22:09           ` Peter Zijlstra
2007-08-21 22:43           ` Christoph Lameter
2007-08-21 22:43             ` Christoph Lameter
2007-08-22  7:02             ` Peter Zijlstra
2007-08-22  7:02               ` Peter Zijlstra
2007-08-22 19:04               ` Christoph Lameter
2007-08-22 19:04                 ` Christoph Lameter
2007-08-22 20:03                 ` Peter Zijlstra
2007-08-22 20:03                   ` Peter Zijlstra
2007-08-22 20:16                   ` Christoph Lameter
2007-08-22 20:16                     ` Christoph Lameter
2007-08-23  7:39                     ` Peter Zijlstra
2007-08-23  7:39                       ` Peter Zijlstra
2007-08-26  4:52                     ` Rik van Riel
2007-08-26  4:52                       ` Rik van Riel
2007-08-23 12:16                   ` Andrea Arcangeli
2007-08-23 12:16                     ` Andrea Arcangeli
2007-08-22  7:45             ` Ingo Molnar
2007-08-22  7:45               ` Ingo Molnar
2007-08-22 19:19               ` Christoph Lameter
2007-08-22 19:19                 ` Christoph Lameter
2007-08-23 12:08           ` Andrea Arcangeli
2007-08-23 12:08             ` Andrea Arcangeli
2007-08-23 12:59             ` Peter Zijlstra
2007-08-23 12:59               ` Peter Zijlstra
2007-08-21 15:16 ` Rik van Riel
2007-08-21 15:16   ` Rik van Riel
2007-08-21 20:59   ` Christoph Lameter
2007-08-21 20:59     ` Christoph Lameter
2007-08-21 21:14     ` Rik van Riel
2007-08-21 21:14       ` Rik van Riel
2007-08-21 21:30       ` Christoph Lameter
2007-08-21 21:30         ` Christoph Lameter
2007-08-21 15:51 ` Dave McCracken
2007-08-21 15:51   ` Dave McCracken
2007-08-21 21:03   ` Christoph Lameter

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