Morning Tejun,

Tejun Heo wrote:
> Hello,
>
> Can you please do the followings?
>
> 1. Apply the attached patch, build & boot
>   
I chose 2.6.30-rc7...
> 2. Trigger the problem and record dmesg
>   
It took 3 days and quite a few hibernate attempts ... :-)

> 3. On failed IO, the kernel will print the address of bi_endio.  Run
>    "nm -n" on the vmlinux in the kernel build root and look up which
>    function it is and post the dmesg and function name.
I did not have that specific vmlinux.o file any more, but
/boot/System.map-2.6.30-rc7-pae shows:
c01a49fd t end_bio_bh_io_sync

Hope this is sufficient to help you. Sorry if this is silly - being so
inexperienced with the kernel - but I wondered if or why a dump_stack()
in that debug patch would not be helpful?

Regards,
Niel