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Diffstat (limited to 'block/blktrace.c')
-rw-r--r--block/blktrace.c32
1 files changed, 13 insertions, 19 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index 2b4ef2b89b8d..135593c8e45b 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2006 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2006 Jens Axboe <axboe@kernel.dk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -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)))
@@ -450,8 +453,10 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
**/
void blk_trace_shutdown(request_queue_t *q)
{
- blk_trace_startstop(q, 0);
- blk_trace_remove(q);
+ if (q->blk_trace) {
+ blk_trace_startstop(q, 0);
+ blk_trace_remove(q);
+ }
}
/*
@@ -471,6 +476,9 @@ static void blk_check_time(unsigned long long *t)
*t -= (a + b) / 2;
}
+/*
+ * calibrate our inter-CPU timings
+ */
static void blk_trace_check_cpu_time(void *data)
{
unsigned long long *t;
@@ -488,20 +496,6 @@ static void blk_trace_check_cpu_time(void *data)
put_cpu();
}
-/*
- * Call blk_trace_check_cpu_time() on each CPU to calibrate our inter-CPU
- * timings
- */
-static void blk_trace_calibrate_offsets(void)
-{
- unsigned long flags;
-
- smp_call_function(blk_trace_check_cpu_time, NULL, 1, 1);
- local_irq_save(flags);
- blk_trace_check_cpu_time(NULL);
- local_irq_restore(flags);
-}
-
static void blk_trace_set_ht_offsets(void)
{
#if defined(CONFIG_SCHED_SMT)
@@ -530,7 +524,7 @@ static void blk_trace_set_ht_offsets(void)
static __init int blk_trace_init(void)
{
mutex_init(&blk_tree_mutex);
- blk_trace_calibrate_offsets();
+ on_each_cpu(blk_trace_check_cpu_time, NULL, 1, 1);
blk_trace_set_ht_offsets();
return 0;