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-rw-r--r--block/blktrace.c5
-rw-r--r--block/ll_rw_blk.c4
-rw-r--r--include/linux/blktrace_api.h5
3 files changed, 9 insertions, 5 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index 92925e7d9e6..b8c0702777f 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -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[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC) };
+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) };
/*
* More could be added as needed, taking care to increment the decrementer
@@ -79,6 +79,8 @@ static u32 bio_act[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
(((rw) & (1 << BIO_RW_BARRIER)) >> (BIO_RW_BARRIER - 0))
#define trace_sync_bit(rw) \
(((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
+#define trace_ahead_bit(rw) \
+ (((rw) & (1 << BIO_RW_AHEAD)) << (BIO_RW_AHEAD - 0))
/*
* The worker for the various blk_add_trace*() types. Fills out a
@@ -100,6 +102,7 @@ void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
what |= ddir_act[rw & WRITE];
what |= bio_act[trace_barrier_bit(rw)];
what |= bio_act[trace_sync_bit(rw)];
+ what |= bio_act[trace_ahead_bit(rw)];
pid = tsk->pid;
if (unlikely(act_log_check(bt, what, sector, pid)))
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index ab17c7224bb..61d6b3c65b6 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3491,8 +3491,8 @@ EXPORT_SYMBOL(end_request);
void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio)
{
- /* first three bits are identical in rq->flags and bio->bi_rw */
- rq->flags |= (bio->bi_rw & 7);
+ /* first two bits are identical in rq->flags and bio->bi_rw */
+ rq->flags |= (bio->bi_rw & 3);
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->nr_hw_segments = bio_hw_segments(q, bio);
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index a7e8cef73d1..7520cc1ff9e 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -11,7 +11,7 @@ enum blktrace_cat {
BLK_TC_READ = 1 << 0, /* reads */
BLK_TC_WRITE = 1 << 1, /* writes */
BLK_TC_BARRIER = 1 << 2, /* barrier */
- BLK_TC_SYNC = 1 << 3, /* barrier */
+ BLK_TC_SYNC = 1 << 3, /* sync IO */
BLK_TC_QUEUE = 1 << 4, /* queueing/merging */
BLK_TC_REQUEUE = 1 << 5, /* requeueing */
BLK_TC_ISSUE = 1 << 6, /* issue */
@@ -19,6 +19,7 @@ enum blktrace_cat {
BLK_TC_FS = 1 << 8, /* fs requests */
BLK_TC_PC = 1 << 9, /* pc requests */
BLK_TC_NOTIFY = 1 << 10, /* special message */
+ BLK_TC_AHEAD = 1 << 11, /* readahead */
BLK_TC_END = 1 << 15, /* only 16-bits, reminder */
};
@@ -147,7 +148,7 @@ static inline void blk_add_trace_rq(struct request_queue *q, struct request *rq,
u32 what)
{
struct blk_trace *bt = q->blk_trace;
- int rw = rq->flags & 0x07;
+ int rw = rq->flags & 0x03;
if (likely(!bt))
return;