On Wed, Dec 09 2020 at 4:58pm -0500, Song Liu <songliubraving@xxxxxx> wrote: > This reverts commit f0e90b6c663a7e3b4736cb318c6c7c589f152c28. > > Matthew Ruffell reported data corruption in raid10 due to the changes > in discard handling [1]. Revert these changes before we find a proper fix. > > [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907262/ > Cc: Matthew Ruffell <matthew.ruffell@xxxxxxxxxxxxx> > Cc: Xiao Ni <xni@xxxxxxxxxx> > Cc: Mike Snitzer <snitzer@xxxxxxxxxx> > Signed-off-by: Song Liu <songliubraving@xxxxxx> > --- > drivers/md/dm-raid.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c > index 9c1f7c4de65b3..dc8568ab96f24 100644 > --- a/drivers/md/dm-raid.c > +++ b/drivers/md/dm-raid.c > @@ -3728,6 +3728,17 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) > > blk_limits_io_min(limits, chunk_size_bytes); > blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs)); > + > + /* > + * RAID10 personality requires bio splitting, > + * RAID0/1/4/5/6 don't and process large discard bios properly. > + */ > + if (rs_is_raid10(rs)) { > + limits->discard_granularity = max(chunk_size_bytes, > + limits->discard_granularity); > + limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors, > + limits->max_discard_sectors); > + } > } > > static void raid_postsuspend(struct dm_target *ti) > -- > 2.24.1 > Short of you sending a v2 pull request to Jens... Jens please pick this up once you pull Song's MD pull that reverts all the MD raid10 discard changes. Thanks! Acked-by: Mike Snitzer <snitzer@xxxxxxxxxx>
