On Wed, May 1, 2013 at 6:59 PM, Mike Snitzer <snitzer@xxxxxxxxxx> wrote: > > The multipath target did not opt-in to supporting WRITE SAME. Please > try this patch. > > From: Mike Snitzer <snitzer@xxxxxxxxxx> > Subject: [PATCH] dm mpath: enable WRITE SAME support > > There is no reason to disallow WRITE SAME support. As far as multipath > is concerned it is just another write request. > > Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> > --- > drivers/md/dm-mpath.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c > index 51bb816..bdf26f5 100644 > --- a/drivers/md/dm-mpath.c > +++ b/drivers/md/dm-mpath.c > @@ -907,6 +907,7 @@ static int multipath_ctr(struct dm_target *ti, unsigned int argc, > > ti->num_flush_bios = 1; > ti->num_discard_bios = 1; > + ti->num_write_same_bios = 1; With this patch, I can see the LV that is on multipath device, advertising the WRITE SAME support and I am able to successfully issue BLKZEROOUT ioctl to that LV. Regards, Bharata. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
