From: Mike Snitzer <snitzer@redhat.com>
To: Kent Overstreet <kmo@daterainc.com>
Cc: axboe@kernel.dk, linux-kernel@vger.kernel.org,
linux-raid@vger.kernel.org, dm-devel@redhat.com,
linux-fsdevel@vger.kernel.org, Alasdair Kergon <agk@redhat.com>
Subject: Re: [PATCH 16/22] dm: Refactor for new bio cloning/splitting
Date: Wed, 2 Oct 2013 23:23:21 -0400 [thread overview]
Message-ID: <20131003032320.GA15322@redhat.com> (raw)
In-Reply-To: <20131003031738.GA27418@kmo-pixel>
On Wed, Oct 02 2013 at 11:17pm -0400,
Kent Overstreet <kmo@daterainc.com> wrote:
> On Sat, Sep 28, 2013 at 12:59:09AM -0400, Mike Snitzer wrote:
> > Hey Kent,
> >
> > I haven't been able to pinpoint the issue yet, but using your for-jens
> > branch, if I create a dm-thin volume with this lvm command:
> > lvcreate -L20G -V20G -T vg/pool --name thinlv
> >
> > and try to format /dev/vg/thinlv with XFS the kernel warns and then
> > hangs with the following:
>
> Thanks, for whatever reason ext4 wasn't tickling that codepath but xfs
> does. I folded the fix into my for-jens branch, here's what changed:
>
> diff --git a/drivers/md/dm.c b/drivers/md/dm.c
> index b60b350..79cee1a 100644
> --- a/drivers/md/dm.c
> +++ b/drivers/md/dm.c
> @@ -1098,7 +1098,7 @@ static void clone_bio(struct dm_target_io *tio, struct bio *bio,
> bio_integrity_clone(clone, bio, GFP_NOIO);
>
> bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector));
> - bio->bi_iter.bi_size = to_bytes(len);
> + clone->bi_iter.bi_size = to_bytes(len);
>
> if (bio_integrity(bio))
> bio_integrity_trim(clone, 0, len);
The above change matches my findings during review (I clearly should've
shared it sooner)
> @@ -1267,7 +1267,7 @@ static int __split_and_process_non_flush(struct clone_info *ci)
> if (!dm_target_is_valid(ti))
> return -EIO;
>
> - len = min_t(unsigned, max_io_len(ci->sector, ti), bio_sectors(bio));
> + len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count);
>
> __clone_and_map_data_bio(ci, ti, ci->sector, len);
>
Great, thanks for finding this, I'll test and review the code further.
next prev parent reply other threads:[~2013-10-03 3:23 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 21:54 [PATCH 0/22] Immutable biovecs, block layer changes Kent Overstreet
2013-08-07 21:54 ` [PATCH 01/22] block: Use rw_copy_check_uvector() Kent Overstreet
2013-08-07 21:54 ` [PATCH 02/22] block: Consolidate duplicated bio_trim() implementations Kent Overstreet
2013-08-07 21:54 ` [PATCH 03/22] bcache: Kill unaligned bvec hack Kent Overstreet
2013-08-07 21:54 ` [PATCH 04/22] block: Abstract out bvec iterator Kent Overstreet
2013-08-08 2:04 ` Ed Cashin
2013-08-09 0:09 ` Kent Overstreet
2013-08-09 0:59 ` Ed Cashin
2013-08-09 1:05 ` Kent Overstreet
2013-08-09 20:16 ` Ed Cashin
2013-08-13 14:03 ` Ed Cashin
2013-08-13 18:51 ` Kent Overstreet
2013-08-13 19:18 ` Ed L Cashin
2013-08-07 21:54 ` [PATCH 05/22] dm: Use bvec_iter for dm_bio_record() Kent Overstreet
2013-08-07 21:54 ` [PATCH 06/22] block: Convert bio_iovec() to bvec_iter Kent Overstreet
2013-08-07 21:54 ` [PATCH 07/22] block: Convert bio_for_each_segment() " Kent Overstreet
[not found] ` <1375912471-5106-1-git-send-email-kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
2013-08-07 21:54 ` [PATCH 08/22] block: Immutable bio vecs Kent Overstreet
2013-08-07 21:54 ` [PATCH 09/22] block: Convert bio_copy_data() to bvec_iter Kent Overstreet
2013-08-07 21:54 ` [PATCH 10/22] bio-integrity: Convert " Kent Overstreet
2013-08-07 21:54 ` [PATCH 11/22] block: Kill bio_segments()/bi_vcnt usage Kent Overstreet
2013-08-07 21:54 ` [PATCH 12/22] block: Convert drivers to immutable biovecs Kent Overstreet
2013-08-07 21:54 ` [PATCH 13/22] ceph: Convert " Kent Overstreet
2013-08-07 21:54 ` [PATCH 14/22] block: Kill bio_iovec_idx(), __bio_iovec() Kent Overstreet
2013-08-07 21:54 ` [PATCH 15/22] rbd: Refactor bio cloning, don't clone biovecs Kent Overstreet
2013-08-07 21:54 ` [PATCH 16/22] dm: Refactor for new bio cloning/splitting Kent Overstreet
2013-09-28 4:59 ` Mike Snitzer
2013-10-03 3:17 ` Kent Overstreet
2013-10-03 3:23 ` Mike Snitzer [this message]
2013-10-03 21:45 ` Kent Overstreet
2013-10-03 22:50 ` Mike Snitzer
2013-10-04 17:07 ` Mike Snitzer
2013-10-07 0:14 ` Mike Snitzer
2013-10-11 4:13 ` Kent Overstreet
2013-10-11 21:16 ` Mike Snitzer
2013-10-11 22:11 ` Kent Overstreet
2013-08-07 21:54 ` [PATCH 17/22] block: Remove bi_idx hacks Kent Overstreet
2013-08-07 21:54 ` [PATCH 18/22] block: Generic bio chaining Kent Overstreet
2013-08-10 7:38 ` Kent Overstreet
2013-08-07 21:54 ` [PATCH 19/22] block: Rename bio_split() -> bio_pair_split() Kent Overstreet
2013-08-07 21:54 ` [PATCH 20/22] block: Introduce new bio_split() Kent Overstreet
2013-08-07 21:54 ` [PATCH 21/22] block: Kill bio_pair_split() Kent Overstreet
2013-08-07 21:54 ` [PATCH 22/22] block: Don't save/copy bvec array anymore, share when cloning Kent Overstreet
2013-08-08 15:09 ` [PATCH 0/22] Immutable biovecs, block layer changes Christoph Hellwig
2013-08-08 21:15 ` Kent Overstreet
2013-09-24 11:00 ` Christoph Hellwig
2013-09-24 13:20 ` Mike Snitzer
2013-09-24 14:29 ` Christoph Hellwig
2013-09-24 19:19 ` Kent Overstreet
2013-09-27 18:38 ` Mike Snitzer
2013-09-24 19:16 ` Kent Overstreet
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