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| author | Alan D. Brunelle <Alan.Brunelle@hp.com> | 2007-08-07 15:30:23 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-08-11 22:34:48 +0200 |
| commit | c7149d6bce2561aeaa48caaa1700aa8b3b22008f (patch) | |
| tree | cfaeda02f5bb62ccf290369b5bd3a5d3f3801cf9 /include/linux/blktrace_api.h | |
| parent | ec05b297f91a443aa26b74059b573bfad49c9ebb (diff) | |
| download | lwn-c7149d6bce2561aeaa48caaa1700aa8b3b22008f.tar.gz lwn-c7149d6bce2561aeaa48caaa1700aa8b3b22008f.zip | |
Fix remap handling by blktrace
This patch provides more information concerning REMAP operations on block
IOs. The additional information provides clearer details at the user level,
and supports post-processing analysis in btt.
o Adds in partition remaps on the same device.
o Fixed up the remap information in DM to be in the right order
o Sent up mapped-from and mapped-to device information
Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/blktrace_api.h')
| -rw-r--r-- | include/linux/blktrace_api.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index 90874a5d7d78..7b5d56b82b59 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -105,7 +105,7 @@ struct blk_io_trace { */ struct blk_io_trace_remap { __be32 device; - u32 __pad; + __be32 device_from; __be64 sector; }; @@ -272,6 +272,7 @@ static inline void blk_add_trace_remap(struct request_queue *q, struct bio *bio, return; r.device = cpu_to_be32(dev); + r.device_from = cpu_to_be32(bio->bi_bdev->bd_dev); r.sector = cpu_to_be64(to); __blk_add_trace(bt, from, bio->bi_size, bio->bi_rw, BLK_TA_REMAP, !bio_flagged(bio, BIO_UPTODATE), sizeof(r), &r); |