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nexedi
linux
Commits
7457e6e2
Commit
7457e6e2
authored
Jul 23, 2006
by
Jens Axboe
Committed by
Jens Axboe
Sep 30, 2006
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[PATCH] blktrace: support for logging metadata reads
Signed-off-by:
Jens Axboe
<
axboe@suse.de
>
parent
374f84ac
Changes
2
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2 changed files
with
5 additions
and
1 deletion
+5
-1
block/blktrace.c
block/blktrace.c
+4
-1
include/linux/blktrace_api.h
include/linux/blktrace_api.h
+1
-0
No files found.
block/blktrace.c
View file @
7457e6e2
...
...
@@ -69,7 +69,7 @@ static u32 ddir_act[2] __read_mostly = { BLK_TC_ACT(BLK_TC_READ), BLK_TC_ACT(BLK
/*
* Bio action bits of interest
*/
static
u32
bio_act
[
5
]
__read_mostly
=
{
0
,
BLK_TC_ACT
(
BLK_TC_BARRIER
),
BLK_TC_ACT
(
BLK_TC_SYNC
),
0
,
BLK_TC_ACT
(
BLK_TC_AHEAD
)
};
static
u32
bio_act
[
9
]
__read_mostly
=
{
0
,
BLK_TC_ACT
(
BLK_TC_BARRIER
),
BLK_TC_ACT
(
BLK_TC_SYNC
),
0
,
BLK_TC_ACT
(
BLK_TC_AHEAD
),
0
,
0
,
0
,
BLK_TC_ACT
(
BLK_TC_META
)
};
/*
* More could be added as needed, taking care to increment the decrementer
...
...
@@ -81,6 +81,8 @@ static u32 bio_act[5] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
(((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
#define trace_ahead_bit(rw) \
(((rw) & (1 << BIO_RW_AHEAD)) << (2 - BIO_RW_AHEAD))
#define trace_meta_bit(rw) \
(((rw) & (1 << BIO_RW_META)) >> (BIO_RW_META - 3))
/*
* The worker for the various blk_add_trace*() types. Fills out a
...
...
@@ -103,6 +105,7 @@ void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
what
|=
bio_act
[
trace_barrier_bit
(
rw
)];
what
|=
bio_act
[
trace_sync_bit
(
rw
)];
what
|=
bio_act
[
trace_ahead_bit
(
rw
)];
what
|=
bio_act
[
trace_meta_bit
(
rw
)];
pid
=
tsk
->
pid
;
if
(
unlikely
(
act_log_check
(
bt
,
what
,
sector
,
pid
)))
...
...
include/linux/blktrace_api.h
View file @
7457e6e2
...
...
@@ -20,6 +20,7 @@ enum blktrace_cat {
BLK_TC_PC
=
1
<<
9
,
/* pc requests */
BLK_TC_NOTIFY
=
1
<<
10
,
/* special message */
BLK_TC_AHEAD
=
1
<<
11
,
/* readahead */
BLK_TC_META
=
1
<<
12
,
/* metadata */
BLK_TC_END
=
1
<<
15
,
/* only 16-bits, reminder */
};
...
...
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