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authorJens Axboe <axboe@suse.de>2006-03-23 14:00:26 -0500
committerJens Axboe <axboe@suse.de>2006-03-23 14:00:26 -0500
commit2056a782f8e7e65fd4bfd027506b4ce1c5e9ccd4 (patch)
treed4fe59a7ca0c110690937085548936a4535c39db /drivers/md
parent6dac40a7ce2483a47b54af07afebeb84131c7228 (diff)
[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 26b08ee425c7..8c82373f7ff3 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -17,6 +17,7 @@
17#include <linux/mempool.h> 17#include <linux/mempool.h>
18#include <linux/slab.h> 18#include <linux/slab.h>
19#include <linux/idr.h> 19#include <linux/idr.h>
20#include <linux/blktrace_api.h>
20 21
21static const char *_name = DM_NAME; 22static const char *_name = DM_NAME;
22 23
@@ -334,6 +335,8 @@ static void dec_pending(struct dm_io *io, int error)
334 /* nudge anyone waiting on suspend queue */ 335 /* nudge anyone waiting on suspend queue */
335 wake_up(&io->md->wait); 336 wake_up(&io->md->wait);
336 337
338 blk_add_trace_bio(io->md->queue, io->bio, BLK_TA_COMPLETE);
339
337 bio_endio(io->bio, io->bio->bi_size, io->error); 340 bio_endio(io->bio, io->bio->bi_size, io->error);
338 free_io(io->md, io); 341 free_io(io->md, io);
339 } 342 }
@@ -392,6 +395,7 @@ static void __map_bio(struct dm_target *ti, struct bio *clone,
392 struct target_io *tio) 395 struct target_io *tio)
393{ 396{
394 int r; 397 int r;
398 sector_t sector;
395 399
396 /* 400 /*
397 * Sanity checks. 401 * Sanity checks.
@@ -407,10 +411,17 @@ static void __map_bio(struct dm_target *ti, struct bio *clone,
407 * this io. 411 * this io.
408 */ 412 */
409 atomic_inc(&tio->io->io_count); 413 atomic_inc(&tio->io->io_count);
414 sector = clone->bi_sector;
410 r = ti->type->map(ti, clone, &tio->info); 415 r = ti->type->map(ti, clone, &tio->info);
411 if (r > 0) 416 if (r > 0) {
412 /* the bio has been remapped so dispatch it */ 417 /* the bio has been remapped so dispatch it */
418
419 blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone,
420 tio->io->bio->bi_bdev->bd_dev, sector,
421 clone->bi_sector);
422
413 generic_make_request(clone); 423 generic_make_request(clone);
424 }
414 425
415 else if (r < 0) { 426 else if (r < 0) {
416 /* error the io and bail out */ 427 /* error the io and bail out */