Commit f8ae7525 authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm thin: cleanup schedule_zero() to read more logically



The overwrite has only ever about optimizing away the need to zero a
block if the entire block was being overwritten.  As such it is only
relevant when zeroing is enabled.
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJoe Thornber <ejt@redhat.com>
parent 8b908f8e
......@@ -1086,16 +1086,14 @@ static void schedule_zero(struct thin_c *tc, dm_block_t virt_block,
* zeroing pre-existing data, we can issue the bio immediately.
* Otherwise we use kcopyd to zero the data first.
*/
if (!pool->pf.zero_new_blocks)
if (pool->pf.zero_new_blocks) {
if (io_overwrites_block(pool, bio))
remap_and_issue_overwrite(tc, bio, data_block, m);
else
ll_zero(tc, m, data_block * pool->sectors_per_block,
(data_block + 1) * pool->sectors_per_block);
} else
process_prepared_mapping(m);
else if (io_overwrites_block(pool, bio))
remap_and_issue_overwrite(tc, bio, data_block, m);
else
ll_zero(tc, m,
data_block * pool->sectors_per_block,
(data_block + 1) * pool->sectors_per_block);
}
static void schedule_external_copy(struct thin_c *tc, dm_block_t virt_block,
......
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