Re: [PATCH]: Free pages from local pcp lists under tight memory conditions

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From: Rohit Seth <rohit.seth@intel.com>
To: Andrew Morton <akpm@osdl.org>
Cc: torvalds@osdl.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, christoph@lameter.com
Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions
Date: Wed, 23 Nov 2005 10:17:00 -0800	[thread overview]
Message-ID: <1132769820.25086.23.camel@akash.sc.intel.com> (raw)
In-Reply-To: <20051122215838.2abfdbd4.akpm@osdl.org>

On Tue, 2005-11-22 at 21:58 -0800, Andrew Morton wrote:
> Andrew Morton <akpm@osdl.org> wrote:
> >
> > The `while' loop worries me for some reason, so I wimped out and just tried
> >  the remote drain once.
> 
> Even the `goto restart' which is in this patch worries me from a livelock
> POV.  Perhaps we should only ever run drain_all_local_pages() once per
> __alloc_pages() invokation.
> And perhaps we should run drain_all_local_pages() for GFP_ATOMIC or
> PF_MEMALLOC attempts too.

Good point for PF_MEMALLOC scenario.

-rohit

WARNING: multiple messages have this Message-ID (diff)

From: Rohit Seth <rohit.seth@intel.com>
To: Andrew Morton <akpm@osdl.org>
Cc: torvalds@osdl.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, christoph@lameter.com
Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions
Date: Wed, 23 Nov 2005 10:17:00 -0800	[thread overview]
Message-ID: <1132769820.25086.23.camel@akash.sc.intel.com> (raw)
In-Reply-To: <20051122215838.2abfdbd4.akpm@osdl.org>

On Tue, 2005-11-22 at 21:58 -0800, Andrew Morton wrote:
> Andrew Morton <akpm@osdl.org> wrote:
> >
> > The `while' loop worries me for some reason, so I wimped out and just tried
> >  the remote drain once.
> 
> Even the `goto restart' which is in this patch worries me from a livelock
> POV.  Perhaps we should only ever run drain_all_local_pages() once per
> __alloc_pages() invokation.
> And perhaps we should run drain_all_local_pages() for GFP_ATOMIC or
> PF_MEMALLOC attempts too.

Good point for PF_MEMALLOC scenario.

-rohit

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next prev parent reply	other threads:[~2005-11-23 18:10 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-11-23  0:10 [PATCH]: Free pages from local pcp lists under tight memory conditions Rohit Seth
2005-11-23  0:10 ` Rohit Seth
2005-11-23  5:36 ` Andrew Morton
2005-11-23  5:36   ` Andrew Morton
2005-11-23  5:58   ` Andrew Morton
2005-11-23  5:58     ` Andrew Morton
2005-11-23 18:17     ` Rohit Seth [this message]
2005-11-23 18:17       ` Rohit Seth
2005-11-23  6:36   ` Christoph Lameter
2005-11-23  6:36     ` Christoph Lameter
2005-11-23  6:42   ` Christoph Lameter
2005-11-23  6:42     ` Christoph Lameter
2005-11-23 16:35     ` Linus Torvalds
2005-11-23 16:35       ` Linus Torvalds
2005-11-23 17:03       ` Christoph Lameter
2005-11-23 17:03         ` Christoph Lameter
2005-11-23 17:54   ` Rohit Seth
2005-11-23 17:54     ` Rohit Seth
2005-11-23 18:06     ` Mel Gorman
2005-11-23 18:06       ` Mel Gorman
2005-11-23 19:41       ` Rohit Seth
2005-11-23 19:41         ` Rohit Seth
2005-11-24  9:25         ` Mel Gorman
2005-11-24  9:25           ` Mel Gorman
2005-11-23 23:26       ` Rohit Seth
2005-11-23 23:26         ` Rohit Seth
2005-11-23 19:30 ` Christoph Lameter
2005-11-23 19:30   ` Christoph Lameter
2005-11-23 19:46   ` Rohit Seth
2005-11-23 19:46     ` Rohit Seth
2005-11-23 19:55     ` Andrew Morton
2005-11-23 19:55       ` Andrew Morton
2005-11-23 21:00       ` Rohit Seth
2005-11-23 21:00         ` Rohit Seth
2005-11-23 21:25         ` Christoph Lameter
2005-11-23 21:25           ` Christoph Lameter
2005-11-23 22:29           ` Rohit Seth
2005-11-23 22:29             ` Rohit Seth
2005-11-23 21:26         ` Andrew Morton
2005-11-23 21:26           ` Andrew Morton
2005-11-23 21:40           ` Rohit Seth
2005-11-23 21:40             ` Rohit Seth
2005-11-24  3:02         ` Paul Jackson
2005-11-24  3:02           ` Paul Jackson
2005-11-29 23:18           ` Rohit Seth
2005-11-29 23:18             ` Rohit Seth
2005-12-01 14:44             ` Paul Jackson
2005-12-01 14:44               ` Paul Jackson
2005-12-02  0:32               ` Nick Piggin
2005-12-02  0:32                 ` Nick Piggin
2005-11-23 22:01       ` Christoph Lameter
2005-11-23 22:01         ` Christoph Lameter

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