From: Christoph Hellwig <hch@infradead.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 0/7] Kill PF_MEMALLOC abuse
Date: Tue, 17 Nov 2009 05:15:26 -0500 [thread overview]
Message-ID: <20091117101526.GA4797@infradead.org> (raw)
In-Reply-To: <20091117161551.3DD4.A69D9226@jp.fujitsu.com>
On Tue, Nov 17, 2009 at 04:16:04PM +0900, KOSAKI Motohiro wrote:
> Some subsystem paid attention (1) only, and start to use PF_MEMALLOC abuse.
> But, the fact is, PF_MEMALLOC is the promise of "I have lots freeable memory.
> if I allocate few memory, I can return more much meory to the system!".
> Non MM subsystem must not use PF_MEMALLOC. Memory reclaim
> need few memory, anyone must not prevent it. Otherwise the system cause
> mysterious hang-up and/or OOM Killer invokation.
And that's exactly the promises xfsbufd gives. It writes out dirty
metadata buffers and will free lots of memory if you kick it.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 0/7] Kill PF_MEMALLOC abuse
Date: Tue, 17 Nov 2009 05:15:26 -0500 [thread overview]
Message-ID: <20091117101526.GA4797@infradead.org> (raw)
In-Reply-To: <20091117161551.3DD4.A69D9226@jp.fujitsu.com>
On Tue, Nov 17, 2009 at 04:16:04PM +0900, KOSAKI Motohiro wrote:
> Some subsystem paid attention (1) only, and start to use PF_MEMALLOC abuse.
> But, the fact is, PF_MEMALLOC is the promise of "I have lots freeable memory.
> if I allocate few memory, I can return more much meory to the system!".
> Non MM subsystem must not use PF_MEMALLOC. Memory reclaim
> need few memory, anyone must not prevent it. Otherwise the system cause
> mysterious hang-up and/or OOM Killer invokation.
And that's exactly the promises xfsbufd gives. It writes out dirty
metadata buffers and will free lots of memory if you kick it.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2009-11-17 10:15 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-17 7:16 [PATCH 0/7] Kill PF_MEMALLOC abuse KOSAKI Motohiro
2009-11-17 7:16 ` KOSAKI Motohiro
2009-11-17 7:17 ` [PATCH 1/7] dm: use __GFP_HIGH instead PF_MEMALLOC KOSAKI Motohiro
2009-11-17 7:17 ` KOSAKI Motohiro
2009-11-17 13:15 ` Alasdair G Kergon
2009-11-17 13:15 ` Alasdair G Kergon
2009-11-17 13:15 ` Alasdair G Kergon
2009-11-18 6:17 ` KOSAKI Motohiro
2009-11-18 6:17 ` KOSAKI Motohiro
2009-11-18 6:17 ` KOSAKI Motohiro
2009-11-17 7:17 ` [PATCH 2/7] mmc: Don't use PF_MEMALLOC KOSAKI Motohiro
2009-11-17 7:17 ` KOSAKI Motohiro
2009-11-17 10:29 ` Alan Cox
2009-11-17 10:29 ` Alan Cox
2009-11-17 10:29 ` Alan Cox
2009-11-17 10:32 ` Minchan Kim
2009-11-17 10:32 ` Minchan Kim
2009-11-17 10:38 ` Oliver Neukum
2009-11-17 10:38 ` Oliver Neukum
2009-11-17 11:58 ` KOSAKI Motohiro
2009-11-17 11:58 ` KOSAKI Motohiro
2009-11-17 12:51 ` Minchan Kim
2009-11-17 12:51 ` Minchan Kim
2009-11-17 20:47 ` Peter Zijlstra
2009-11-17 20:47 ` Peter Zijlstra
2009-11-18 0:01 ` Minchan Kim
2009-11-18 0:01 ` Minchan Kim
2009-11-18 9:56 ` Peter Zijlstra
2009-11-18 9:56 ` Peter Zijlstra
2009-11-18 10:31 ` Minchan Kim
2009-11-18 10:31 ` Minchan Kim
2009-11-18 10:54 ` Peter Zijlstra
2009-11-18 10:54 ` Peter Zijlstra
2009-11-18 11:15 ` Minchan Kim
2009-11-18 11:15 ` Minchan Kim
2009-11-17 7:18 ` [PATCH 3/7] mtd: " KOSAKI Motohiro
2009-11-17 7:18 ` KOSAKI Motohiro
2009-11-17 7:18 ` KOSAKI Motohiro
2009-11-17 7:19 ` [PATCH 4/7] nandsim: " KOSAKI Motohiro
2009-11-17 7:19 ` KOSAKI Motohiro
2009-11-17 7:19 ` KOSAKI Motohiro
2009-11-23 15:00 ` Artem Bityutskiy
2009-11-23 15:00 ` Artem Bityutskiy
2009-11-23 15:00 ` Artem Bityutskiy
2009-11-23 20:01 ` Adrian Hunter
2009-11-23 20:01 ` Adrian Hunter
2009-11-23 20:01 ` Adrian Hunter
2009-11-24 10:46 ` KOSAKI Motohiro
2009-11-24 10:46 ` KOSAKI Motohiro
2009-11-24 10:46 ` KOSAKI Motohiro
2009-11-24 11:56 ` Adrian Hunter
2009-11-24 11:56 ` Adrian Hunter
2009-11-24 11:56 ` Adrian Hunter
2009-11-25 0:42 ` KOSAKI Motohiro
2009-11-25 0:42 ` KOSAKI Motohiro
2009-11-25 0:42 ` KOSAKI Motohiro
2009-11-25 7:13 ` Adrian Hunter
2009-11-25 7:13 ` Adrian Hunter
2009-11-25 7:13 ` Adrian Hunter
2009-11-25 7:18 ` KOSAKI Motohiro
2009-11-25 7:18 ` KOSAKI Motohiro
2009-11-25 7:18 ` KOSAKI Motohiro
2009-11-17 7:21 ` [PATCH 5/7] Revert "Intel IOMMU: Avoid memory allocation failures in dma map api calls" KOSAKI Motohiro
2009-11-17 7:21 ` KOSAKI Motohiro
2009-11-17 7:22 ` [PATCH 6/7] cifs: Don't use PF_MEMALLOC KOSAKI Motohiro
2009-11-17 7:22 ` KOSAKI Motohiro
2009-11-17 7:32 ` [PATCH] Mark cifs mailing list as "moderated as non-subscribers" KOSAKI Motohiro
2009-11-17 7:32 ` KOSAKI Motohiro
2009-11-17 12:47 ` [PATCH 6/7] cifs: Don't use PF_MEMALLOC Jeff Layton
2009-11-17 12:47 ` Jeff Layton
2009-11-17 16:40 ` Steve French
2009-11-18 6:31 ` KOSAKI Motohiro
2009-11-18 6:31 ` KOSAKI Motohiro
2009-11-17 16:41 ` Steve French
2009-11-17 7:23 ` [PATCH 7/7] xfs: " KOSAKI Motohiro
2009-11-17 7:23 ` KOSAKI Motohiro
2009-11-17 7:23 ` KOSAKI Motohiro
2009-11-17 22:11 ` Dave Chinner
2009-11-17 22:11 ` Dave Chinner
2009-11-17 22:11 ` Dave Chinner
2009-11-17 22:11 ` Dave Chinner
2009-11-18 8:56 ` KOSAKI Motohiro
2009-11-18 8:56 ` KOSAKI Motohiro
2009-11-18 8:56 ` KOSAKI Motohiro
2009-11-18 8:56 ` KOSAKI Motohiro
2009-11-18 22:16 ` Dave Chinner
2009-11-18 22:16 ` Dave Chinner
2009-11-18 22:16 ` Dave Chinner
2009-11-17 8:07 ` [PATCH 0/7] Kill PF_MEMALLOC abuse David Rientjes
2009-11-17 8:07 ` David Rientjes
2009-11-17 8:33 ` KOSAKI Motohiro
2009-11-17 8:33 ` KOSAKI Motohiro
2009-11-17 8:36 ` David Rientjes
2009-11-17 8:36 ` David Rientjes
2009-11-17 20:56 ` Peter Zijlstra
2009-11-17 20:56 ` Peter Zijlstra
2009-11-18 5:55 ` KOSAKI Motohiro
2009-11-18 5:55 ` KOSAKI Motohiro
2009-11-17 10:15 ` Christoph Hellwig [this message]
2009-11-17 10:15 ` Christoph Hellwig
2009-11-17 10:24 ` KOSAKI Motohiro
2009-11-17 10:24 ` KOSAKI Motohiro
2009-11-17 10:27 ` Christoph Hellwig
2009-11-17 10:27 ` Christoph Hellwig
2009-11-17 12:24 ` KOSAKI Motohiro
2009-11-17 12:24 ` KOSAKI Motohiro
2009-11-17 12:47 ` Christoph Hellwig
2009-11-17 12:47 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20091117101526.GA4797@infradead.org \
--to=hch@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.