On Fri, 2007-06-08 at 00:41 -0400, Matt Moen wrote:
> I recently purchased a Soekris net4801 [1] along with its hard drive kit
> and a Toshiba laptop drive.  I've run into an unusual bug that I can
> consistently reproduce with this machine when using JFS, but not when
> using ext3 or xfs.
> 
> If I try untaring something, kicking off a kernel build, or do anything
> else that's IO intensive on a JFS filesystem, the process will get stuck
> in uninterruptible sleep within a minute or two.  This only occurs with
> kernels 2.6.17.x or newer; Kernels 2.6.16.x and earlier don't seem to
> have this bug.

I'm pretty confident that this patch will fix it (sorry for the long
url):

http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=05ec9e26be1f668ccba4ca54d9a4966c6208c611

This is fixed in 2.6.21.2, and it's queued for 2.6.20.14.

> Selecting CONFIG_JFS_DEBUG doesn't seem to shed any further light into
> this issue.
> 
> I was unable to reproduce this behavior when I moved the Toshiba hard drive
> to an old Thinkpad I had laying around.
> 
> What are the next steps I should take in debugging this?

I hope that patch fixes things.  If not, please let me know.

> Thanks,
> 
> Matt
> 
> 
> [1] http://www.soekris.com/net4801.htm

Thanks,
Shaggy
-- 
David Kleikamp
IBM Linux Technology Center


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