From: Neil Brown <neilb@xxxxxxx>
Date: Thu, Jan 12, 2006 at 05:36:42PM +1100
Sent-To:
> On Thursday January 12, thunder7@xxxxxxxxx wrote:
> >
> > 2.6.15-mm3 hangs during boot for me, after the lines
> >
> > ========
> > md4: bitmap initialized from disk: read 15/15 pages, set 51 bits, status: 0
> > created bitmap (224 pages) for device md4
> > ========
> >
> > ctrl-alt-del to reboot works sometimes (2 out of 3). Below is complete
> > dmesg (from 2.6.15-mm2, ver_linux output, .config and raid details).
>
> Yep, this is probably a known problem with recent changes to the
> 'barrier' code.
>
> Try to convince md not to use barrier by changing md_super_write in
> drivers/md/md.c. Simply remove
>
> if (!test_bit(BarriersNotsupp, &rdev->flags)) {
> struct bio *rbio;
> rw |= (1<<BIO_RW_BARRIER);
> rbio = bio_clone(bio, GFP_NOIO);
> rbio->bi_private = bio;
> rbio->bi_end_io = super_written_barrier;
> submit_bio(rw, rbio);
> } else
>
> leaving the
> submit_bio(rw, rbio);
>
> which comes after it.
>
With this patch, it boots and works just fine.
Kind regards,
Jurriaan
--
His pride could withstand anything. He simply wouldn't care.
Melanie Rawn - Skybowl
Debian (Unstable) GNU/Linux 2.6.15-mm3 2x4802 bogomips 0.31
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