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| author | Mike Snitzer <snitzer@redhat.com> | 2012-07-27 15:08:00 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 15:08:00 +0100 |
| commit | 542f90381422676544382d4071ba44a2de90a0c1 (patch) | |
| tree | 0eae6798ab2fdef68a0eb1ea5ac14f3cc3ffb740 /drivers/md/dm-raid1.c | |
| parent | 1df05483d758ea43abc375869fbe06be506ba827 (diff) | |
| download | lwn-542f90381422676544382d4071ba44a2de90a0c1.tar.gz lwn-542f90381422676544382d4071ba44a2de90a0c1.zip | |
dm: support non power of two target max_io_len
Remove the restriction that limits a target's specified maximum incoming
I/O size to be a power of 2.
Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'.
Change it from sector_t to uint32_t, which is plenty big enough, and
introduce a wrapper function dm_set_target_max_io_len() to set it.
Use sector_div() to process it now that it is not necessarily a power of 2.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid1.c')
| -rw-r--r-- | drivers/md/dm-raid1.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index b58b7a33914a..819ccba65912 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -1081,7 +1081,11 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ti->private = ms; - ti->split_io = dm_rh_get_region_size(ms->rh); + + r = dm_set_target_max_io_len(ti, dm_rh_get_region_size(ms->rh)); + if (r) + goto err_free_context; + ti->num_flush_requests = 1; ti->num_discard_requests = 1; ti->discard_zeroes_data_unsupported = 1; |