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blktrace: support discard requests

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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
David Woodhouse
2008-08-10 11:21:57 +01:00
committed by Jens Axboe
parent fdc53971bc
commit 27b29e86bf
2 changed files with 14 additions and 1 deletions
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4
include/linux/blktrace_api.h
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@@ -21,6 +21,7 @@ enum blktrace_cat {
BLK_TC_NOTIFY = 1 << 10, /* special message */
BLK_TC_AHEAD = 1 << 11, /* readahead */
BLK_TC_META = 1 << 12, /* metadata */
BLK_TC_DISCARD = 1 << 13, /* discard requests */
BLK_TC_END = 1 << 15, /* only 16-bits, reminder */
};
@@ -195,6 +196,9 @@ static inline void blk_add_trace_rq(struct request_queue *q, struct request *rq,
if (likely(!bt))
return;
if (blk_discard_rq(rq))
rw |= (1 << BIO_RW_DISCARD);
if (blk_pc_request(rq)) {
what |= BLK_TC_ACT(BLK_TC_PC);
__blk_add_trace(bt, 0, rq->data_len, rw, what, rq->errors, sizeof(rq->cmd), rq->cmd);