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| author |   Jan Kara <jack@suse.cz> | 2019-02-07 11:55:39 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-02-07 12:57:17 -0700 |
| commit | 0803de78049fe1b0baf44bcddc727b036fb9139b (patch) | |
| tree | ffaa5b77647c61a2a92cd054e1fbe81283213f29 /include/linux/blktrace_api.h | |
| parent | fs: ratelimit __find_get_block_slow() failure message. (diff) | |
| download | linux-dev-0803de78049fe1b0baf44bcddc727b036fb9139b.tar.xz linux-dev-0803de78049fe1b0baf44bcddc727b036fb9139b.zip | |
blktrace: Show requests without sector
Currently, blktrace will not show requests that don't have any data as
rq->__sector is initialized to -1 which is out of device range and thus
discarded by act_log_check(). This is most notably the case for cache
flush requests sent to the device. Fix the problem by making
blk_rq_trace_sector() return 0 for requests without initialized sector.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blktrace_api.h')
| -rw-r--r-- | include/linux/blktrace_api.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index 8804753805ac..7bb2d8de9f30 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -116,7 +116,13 @@ extern void blk_fill_rwbs(char *rwbs, unsigned int op, int bytes); static inline sector_t blk_rq_trace_sector(struct request *rq) { - return blk_rq_is_passthrough(rq) ? 0 : blk_rq_pos(rq); + /* + * Tracing should ignore starting sector for passthrough requests and + * requests where starting sector didn't get set. + */ + if (blk_rq_is_passthrough(rq) || blk_rq_pos(rq) == (sector_t)-1) + return 0; + return blk_rq_pos(rq); } static inline unsigned int blk_rq_trace_nr_sectors(struct request *rq) |