On Wed, 29 May 2013 15:03:40 +0200 Jens Axboe <ax...@kernel.dk> wrote:
> On Wed, May 29 2013, Richard W.M. Jones wrote: > > > > On Sun, May 19, 2013 at 10:51:45AM -0700, Kent Overstreet wrote: > > > Sorry for the delay - been vacationing. Reproduced the original bug, > > > here's a patch that fixes it: > > > > > > > > > commit 402f5db3708b2062795a384a3d8397cf702e27bc > > > Author: Kent Overstreet <koverstr...@google.com> > > > Date: Sun May 19 10:27:07 2013 -0700 > > > > > > raid5: Initialize bi_vcnt > > > > > > The patch that converted raid5 to use bio_reset() forgot to initialize > > > bi_vcnt. > > > > > > Signed-off-by: Kent Overstreet <koverstr...@google.com> > > > Cc: NeilBrown <ne...@suse.de> > > > Cc: Jens Axboe <ax...@kernel.dk> > > > Cc: linux-r...@vger.kernel.org > > > > > > diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c > > > index 9359828..753f318 100644 > > > --- a/drivers/md/raid5.c > > > +++ b/drivers/md/raid5.c > > > @@ -664,6 +664,7 @@ static void ops_run_io(struct stripe_head *sh, struct > > > stripe_head_state *s) > > > if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags)) > > > bi->bi_rw |= REQ_FLUSH; > > > > > > + bi->bi_vcnt = 1; > > > bi->bi_io_vec[0].bv_len = STRIPE_SIZE; > > > bi->bi_io_vec[0].bv_offset = 0; > > > bi->bi_size = STRIPE_SIZE; > > > @@ -701,6 +702,7 @@ static void ops_run_io(struct stripe_head *sh, struct > > > stripe_head_state *s) > > > else > > > rbi->bi_sector = (sh->sector > > > + rrdev->data_offset); > > > + rbi->bi_vcnt = 1; > > > rbi->bi_io_vec[0].bv_len = STRIPE_SIZE; > > > rbi->bi_io_vec[0].bv_offset = 0; > > > rbi->bi_size = STRIPE_SIZE; > > > > Ditto to the previous follow up. We've been tracking this > > bug for nearly a month: > > > > https://bugzilla.redhat.com/show_bug.cgi?id=962079 > > > > Please include this (or the other) patch to fix it. > > I'm assuming both Kent and I are waiting for Neil to pick it up. Neil, I > can include this in my next round going upstream, just let me know. It > should have been sent upstream a while back, sorry guys. > Seems you were waiting for me, and I was waiting for you :-) Yes: please include it with your next round. Thanks! NeilBrown
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