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[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23

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Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2006-03-23 20:00:26 +01:00
commit 2056a782f8
17 changed files with 916 additions and 3 deletions
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4
fs/bio.c
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@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/workqueue.h>
#include <linux/blktrace_api.h>
#include <scsi/sg.h> /* for struct sg_iovec */
#define BIO_POOL_SIZE 256
@ -1095,6 +1096,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
if (!bp)
return bp;
blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi,
bi->bi_sector + first_sectors);
BUG_ON(bi->bi_vcnt != 1);
BUG_ON(bi->bi_idx != 0);
atomic_set(&bp->cnt, 3);