On Wed, Oct 02 2013 at 11:17pm -0400, Kent Overstreet <kmo@xxxxxxxxxxxxx> 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. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
