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Kirill Smelkov
linux
Commits
d07a241d
Commit
d07a241d
authored
Dec 11, 2017
by
Mike Snitzer
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dm mpath: optimize retrieval of bio_details from per-bio-data
Signed-off-by:
Mike Snitzer
<
snitzer@redhat.com
>
parent
d0442f80
Changes
1
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1 changed file
with
3 additions
and
5 deletions
+3
-5
drivers/md/dm-mpath.c
drivers/md/dm-mpath.c
+3
-5
No files found.
drivers/md/dm-mpath.c
View file @
d07a241d
...
...
@@ -264,19 +264,17 @@ static struct dm_mpath_io *get_mpio_from_bio(struct bio *bio)
return
dm_per_bio_data
(
bio
,
multipath_per_bio_data_size
());
}
static
struct
dm_bio_details
*
get_bio_details_from_
bio
(
struct
bio
*
b
io
)
static
struct
dm_bio_details
*
get_bio_details_from_
mpio
(
struct
dm_mpath_io
*
mp
io
)
{
/* dm_bio_details is immediately after the dm_mpath_io in bio's per-bio-data */
struct
dm_mpath_io
*
mpio
=
get_mpio_from_bio
(
bio
);
void
*
bio_details
=
mpio
+
1
;
return
bio_details
;
}
static
void
multipath_init_per_bio_data
(
struct
bio
*
bio
,
struct
dm_mpath_io
**
mpio_p
)
{
struct
dm_mpath_io
*
mpio
=
get_mpio_from_bio
(
bio
);
struct
dm_bio_details
*
bio_details
=
get_bio_details_from_
bio
(
b
io
);
struct
dm_bio_details
*
bio_details
=
get_bio_details_from_
mpio
(
mp
io
);
mpio
->
nr_bytes
=
bio
->
bi_iter
.
bi_size
;
mpio
->
pgpath
=
NULL
;
...
...
@@ -1554,7 +1552,7 @@ static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone,
}
/* Queue for the daemon to resubmit */
dm_bio_restore
(
get_bio_details_from_
bio
(
clone
),
clone
);
dm_bio_restore
(
get_bio_details_from_
mpio
(
mpio
),
clone
);
spin_lock_irqsave
(
&
m
->
lock
,
flags
);
bio_list_add
(
&
m
->
queued_bios
,
clone
);
...
...
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