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- Fix excessive bio splitting that caused performance regressions.

Browse source 
- Fix logic bug in DM integrity discard support's integrity tag
   testing.
 
 - Fix DM integrity warning on ppc64le due to missing cast.
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Merge tag 'for-5.7/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix excessive bio splitting that caused performance regressions

 - Fix logic bug in DM integrity discard support's integrity tag testing

 - Fix DM integrity warning on ppc64le due to missing cast

* tag 'for-5.7/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm integrity: fix logic bug in integrity tag testing
  Revert "dm: always call blk_queue_split() in dm_process_bio()"
  dm integrity: fix ppc64le warning
This commit is contained in:
Linus Torvalds 2020-04-03 14:44:48 -07:00
parent 86f26a77cb 8267d8fb48
commit de3c913c6e
2 changed files with 5 additions and 4 deletions
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4
drivers/md/dm-integrity.c
View file

@ -1333,7 +1333,7 @@ static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, se
if (likely(is_power_of_2(ic->tag_size))) {
if (unlikely(memcmp(dp, tag, to_copy)))
if (unlikely(!ic->discard) ||
unlikely(!memchr_inv(dp, DISCARD_FILLER, to_copy))) {
unlikely(memchr_inv(dp, DISCARD_FILLER, to_copy) != NULL)) {
goto thorough_test;
}
} else {
@ -3069,7 +3069,7 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
switch (type) {
case STATUSTYPE_INFO:
DMEMIT("%llu %llu",
atomic64_read(&ic->number_of_mismatches),
(unsigned long long)atomic64_read(&ic->number_of_mismatches),
ic->provided_data_sectors);
if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING))
DMEMIT(" %llu", le64_to_cpu(ic->sb->recalc_sector));

5
drivers/md/dm.c
View file

@ -1740,8 +1740,9 @@ static blk_qc_t dm_process_bio(struct mapped_device *md,
* won't be imposed.
*/
if (current->bio_list) {
blk_queue_split(md->queue, &bio);
if (!is_abnormal_io(bio))
if (is_abnormal_io(bio))
blk_queue_split(md->queue, &bio);
else
dm_queue_split(md, ti, &bio);
}