From: Fengguang Wu <wfg@mail.ustc.edu.cn>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Chuck Ebbert <cebbert@redhat.com>, Greg KH <gregkh@suse.de>,
Chakri n <chakriin5@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Krzysztof Oledzki <olel@ans.pl>,
linux-pm <linux-pm@lists.linux-foundation.org>,
lkml <linux-kernel@vger.kernel.org>,
richard kennedy <richard@rsk.demon.co.uk>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] writeback: avoid possible balance_dirty_pages() lockup on a light-load bdi
Date: Tue, 2 Oct 2007 21:27:02 +0800 [thread overview]
Message-ID: <391331626.16970@ustc.edu.cn> (raw)
Message-ID: <20071002132702.GA10967@mail.ustc.edu.cn> (raw)
In-Reply-To: <20071002121327.GA5718@mail.ustc.edu.cn>
On Tue, Oct 02, 2007 at 08:13:27PM +0800, Fengguang Wu wrote:
[...]
> One more serious problem is, a busy writer could also drain all the
> dirty pages and make (nr_writeback == dirty_limit+1MB). In that case,
> I suspect the light-load sdb writer still have good chance to
> make progress(need confirmation).
Well it seems to be a really tricky issue without knowing the per-bdi
numbers. Maybe we could just encourage users to upgrade to 2.6.24...
next prev parent reply other threads:[~2007-10-02 13:27 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-28 6:32 A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) Chakri n
2007-09-28 6:50 ` Andrew Morton
2007-09-28 6:59 ` Peter Zijlstra
2007-09-28 8:27 ` Chakri n
2007-09-28 8:27 ` Chakri n
2007-09-28 8:27 ` Chakri n
2007-09-28 8:40 ` Peter Zijlstra
2007-09-28 9:01 ` Chakri n
2007-09-28 9:01 ` Chakri n
2007-09-28 9:12 ` Peter Zijlstra
2007-09-28 9:20 ` Chakri n
2007-09-28 9:20 ` Chakri n
2007-09-28 9:23 ` Peter Zijlstra
2007-09-28 9:23 ` Peter Zijlstra
2007-09-28 10:36 ` Chakri n
2007-09-28 10:36 ` Chakri n
2007-09-28 10:36 ` Chakri n
2007-09-28 9:23 ` Peter Zijlstra
2007-09-28 9:20 ` Chakri n
2007-09-28 9:12 ` Peter Zijlstra
2007-09-28 9:01 ` Chakri n
2007-09-28 8:40 ` Peter Zijlstra
2007-09-28 6:59 ` Peter Zijlstra
2007-09-28 13:28 ` Jonathan Corbet
2007-09-28 13:28 ` Jonathan Corbet
2007-09-28 13:35 ` Peter Zijlstra
2007-09-28 13:35 ` Peter Zijlstra
2007-09-28 16:45 ` Alan Stern
2007-09-28 16:45 ` [linux-pm] " Alan Stern
2007-09-28 16:45 ` Alan Stern
2007-09-29 1:27 ` Daniel Phillips
2007-09-29 1:27 ` Daniel Phillips
2007-09-29 1:27 ` Daniel Phillips
2007-09-28 18:04 ` Andrew Morton
2007-09-28 18:04 ` Andrew Morton
2007-09-28 18:04 ` Andrew Morton
2007-09-28 13:28 ` Jonathan Corbet
2007-09-28 17:00 ` Trond Myklebust
2007-09-28 17:00 ` Trond Myklebust
2007-09-28 18:49 ` Andrew Morton
2007-09-28 18:49 ` Andrew Morton
2007-09-28 18:48 ` Peter Zijlstra
2007-09-28 19:16 ` Andrew Morton
2007-09-28 19:16 ` Andrew Morton
2007-10-02 13:36 ` Peter Zijlstra
2007-10-02 15:42 ` Randy Dunlap
2007-10-03 9:28 ` [PATCH] lockstat: documentation Peter Zijlstra
2007-10-03 9:35 ` Ingo Molnar
2007-09-28 19:16 ` A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) Andrew Morton
2007-09-28 18:48 ` Peter Zijlstra
2007-09-28 19:16 ` Trond Myklebust
2007-09-28 19:16 ` Trond Myklebust
2007-09-28 19:26 ` Andrew Morton
2007-09-28 19:26 ` Andrew Morton
2007-09-28 19:26 ` Andrew Morton
2007-09-28 19:52 ` Trond Myklebust
2007-09-28 19:52 ` Trond Myklebust
2007-09-28 20:10 ` Andrew Morton
2007-09-28 20:10 ` Andrew Morton
2007-09-28 20:32 ` Trond Myklebust
2007-09-28 20:32 ` Trond Myklebust
2007-09-28 20:32 ` Trond Myklebust
2007-09-28 20:43 ` Andrew Morton
2007-09-28 20:43 ` Andrew Morton
2007-09-28 21:36 ` Chakri n
2007-09-28 23:33 ` Chakri n
2007-09-28 23:33 ` Chakri n
2007-09-28 23:33 ` Chakri n
2007-09-28 21:36 ` Chakri n
2007-09-28 20:10 ` Andrew Morton
2007-09-28 20:24 ` Daniel Phillips
2007-09-28 20:24 ` Daniel Phillips
2007-09-28 19:52 ` Trond Myklebust
2007-09-29 1:51 ` KDB? Daniel Phillips
2007-09-29 1:51 ` KDB? Daniel Phillips
2007-09-29 1:51 ` KDB? Daniel Phillips
2007-09-28 18:49 ` A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) Andrew Morton
2007-09-29 0:46 ` Daniel Phillips
2007-09-29 0:46 ` Daniel Phillips
2007-09-29 0:46 ` Daniel Phillips
2007-09-28 6:50 ` Andrew Morton
2007-09-29 11:04 ` Fengguang Wu
2007-09-29 11:04 ` Fengguang Wu
2007-09-29 11:04 ` Fengguang Wu
2007-09-29 11:48 ` Peter Zijlstra
2007-09-29 11:48 ` Peter Zijlstra
2007-09-29 12:28 ` Fengguang Wu
2007-09-29 12:28 ` Fengguang Wu
2007-09-29 14:43 ` Peter Zijlstra
2007-09-29 14:43 ` Peter Zijlstra
2007-09-29 12:28 ` Fengguang Wu
2007-10-01 15:57 ` Chuck Ebbert
2007-10-02 2:00 ` [PATCH] writeback: avoid possible balance_dirty_pages() lockup on a light-load bdi Fengguang Wu
2007-10-02 2:00 ` Fengguang Wu
2007-10-02 2:14 ` Andrew Morton
2007-10-02 2:14 ` Andrew Morton
2007-10-02 12:13 ` Fengguang Wu
2007-10-02 12:13 ` Fengguang Wu
2007-10-02 12:13 ` Fengguang Wu
2007-10-02 13:27 ` Fengguang Wu
2007-10-02 13:27 ` Fengguang Wu [this message]
2007-10-02 18:35 ` Chuck Ebbert
2007-10-02 18:35 ` Chuck Ebbert
2007-10-02 13:27 ` Fengguang Wu
2007-10-02 2:00 ` Fengguang Wu
2007-10-03 12:46 ` richard kennedy
2007-10-04 1:50 ` Fengguang Wu
2007-10-04 1:50 ` Fengguang Wu
2007-10-04 1:50 ` Fengguang Wu
2007-10-03 12:46 ` richard kennedy
2007-10-01 15:57 ` A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) Chuck Ebbert
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