xiaomi-sm8450/android_kernel_xiaomi_sm8450
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dm: support non power of two target max_io_len

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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>
This commit is contained in:
Mike Snitzer
2012-07-27 15:08:00 +01:00
committed by Alasdair G Kergon
parent 1df05483d7
commit 542f903814
8 changed files with 69 additions and 33 deletions
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6
drivers/md/dm-raid1.c
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@@ -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;