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Message-Id: <1216774188.6505.1.camel@mingming-laptop>
Date: Tue, 22 Jul 2008 17:49:48 -0700
From: Mingming Cao <cmm@...ibm.com>
To: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc: Shehjar Tikoo <shehjart@....unsw.edu.au>,
linux-ext4@...r.kernel.org
Subject: Re: Crash and stack trace for jbd2 under ext4
在 2008-07-21一的 13:50 +0530,Aneesh Kumar K.V写道:
> On Mon, Jul 21, 2008 at 02:28:39PM +1000, Shehjar Tikoo wrote:
> > Hi all
> >
> > Please see the contents of the file
> > for details of two similar crashes observed
> > on two different commits. Both crashes were
> > observed while using ext4 on the server while
> > accessing the export through NFSv3. The link
> > has more details.
> >
> > http://www.gelato.unsw.edu.au/~shehjart/docs/jbd_ext4_crash.txt
> >
>
> I guess we cannot use
> #define EXT4_MAX_WRITEBACK_CREDITS DIO_CREDITS
>
> We do multiple block allocation in ext4_da_writepages and we can
> get these blocks from different block groups. So we may need to update
> bitmap of multiple groups.
>
> -aneesh
Yeah, the journal credit reservation for writepages() need a little
attention. I will send a RFC patch shortly.
Mingming
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