Merge branch 'blktrace' of git://brick.kernel.dk/data/git/linux-2.6-block
* 'blktrace' of git://brick.kernel.dk/data/git/linux-2.6-block: [PATCH] Only the first two bits in bio->bi_rw and rq->flags match [PATCH] blktrace: readahead support [PATCH] blktrace: fix barrier vs sync typo
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commit
84e74f6b77
3 changed files with 9 additions and 5 deletions
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@ -69,7 +69,7 @@ static u32 ddir_act[2] __read_mostly = { BLK_TC_ACT(BLK_TC_READ), BLK_TC_ACT(BLK
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/*
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* Bio action bits of interest
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*/
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static u32 bio_act[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_ACT(BLK_TC_SYNC) };
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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) };
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/*
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* More could be added as needed, taking care to increment the decrementer
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@ -79,6 +79,8 @@ static u32 bio_act[3] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
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(((rw) & (1 << BIO_RW_BARRIER)) >> (BIO_RW_BARRIER - 0))
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#define trace_sync_bit(rw) \
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(((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
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#define trace_ahead_bit(rw) \
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(((rw) & (1 << BIO_RW_AHEAD)) << (BIO_RW_AHEAD - 0))
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/*
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* The worker for the various blk_add_trace*() types. Fills out a
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@ -100,6 +102,7 @@ void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
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what |= ddir_act[rw & WRITE];
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what |= bio_act[trace_barrier_bit(rw)];
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what |= bio_act[trace_sync_bit(rw)];
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what |= bio_act[trace_ahead_bit(rw)];
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pid = tsk->pid;
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if (unlikely(act_log_check(bt, what, sector, pid)))
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@ -3491,8 +3491,8 @@ EXPORT_SYMBOL(end_request);
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void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio)
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{
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/* first three bits are identical in rq->flags and bio->bi_rw */
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rq->flags |= (bio->bi_rw & 7);
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/* first two bits are identical in rq->flags and bio->bi_rw */
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rq->flags |= (bio->bi_rw & 3);
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rq->nr_phys_segments = bio_phys_segments(q, bio);
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rq->nr_hw_segments = bio_hw_segments(q, bio);
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@ -11,7 +11,7 @@ enum blktrace_cat {
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BLK_TC_READ = 1 << 0, /* reads */
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BLK_TC_WRITE = 1 << 1, /* writes */
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BLK_TC_BARRIER = 1 << 2, /* barrier */
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BLK_TC_SYNC = 1 << 3, /* barrier */
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BLK_TC_SYNC = 1 << 3, /* sync IO */
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BLK_TC_QUEUE = 1 << 4, /* queueing/merging */
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BLK_TC_REQUEUE = 1 << 5, /* requeueing */
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BLK_TC_ISSUE = 1 << 6, /* issue */
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@ -19,6 +19,7 @@ enum blktrace_cat {
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BLK_TC_FS = 1 << 8, /* fs requests */
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BLK_TC_PC = 1 << 9, /* pc requests */
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BLK_TC_NOTIFY = 1 << 10, /* special message */
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BLK_TC_AHEAD = 1 << 11, /* readahead */
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BLK_TC_END = 1 << 15, /* only 16-bits, reminder */
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};
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@ -147,7 +148,7 @@ static inline void blk_add_trace_rq(struct request_queue *q, struct request *rq,
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u32 what)
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{
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struct blk_trace *bt = q->blk_trace;
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int rw = rq->flags & 0x07;
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int rw = rq->flags & 0x03;
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if (likely(!bt))
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return;
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