Re: Crash and stack trace for jbd2 under ext4

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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
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