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Li Zefan 1d54ad6da9 blktrace: add trace/ to /sys/block/sda ... Impact: allow ftrace-plugin blktrace to trace device-mapper devices To trace a single partition: # echo 1 > /sys/block/sda/sda1/enable To trace the whole sda instead: # echo 1 > /sys/block/sda/enable Thus we also fix an issue reported by Ted, that ftrace-plugin blktrace can't be used to trace device-mapper devices. Now: # echo 1 > /sys/block/dm-0/trace/enable echo: write error: No such device or address # mount -t ext4 /dev/dm-0 /mnt # echo 1 > /sys/block/dm-0/trace/enable # echo blk > /debug/tracing/current_tracer Reported-by: Theodore Tso <tytso@mit.edu> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Shawn Du <duyuyang@gmail.com> Cc: Jens Axboe <jens.axboe@oracle.com> LKML-Reference: <49E42665.6020506@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		16 years ago
..
Kconfig	tracing/blktrace: move the tracing file to kernel/trace	16 years ago
Kconfig.iosched	update I/O sched Kconfig help texts - CFQ is now default, not AS.	18 years ago
Makefile	tracing/blktrace: move the tracing file to kernel/trace	16 years ago
as-iosched.c	block: get rid of elevator_t typedef	16 years ago
blk-barrier.c	block: Fix documentation for blkdev_issue_flush()	16 years ago
blk-core.c	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	16 years ago
blk-exec.c	Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.	17 years ago
blk-integrity.c	block: Allow empty integrity profile	16 years ago
blk-ioc.c	cfq-iosched: fix RCU race in the cfq io_context destructor handling	17 years ago
blk-map.c	[SCSI] block: make blk_rq_map_user take a NULL user-space buffer for WRITE	16 years ago
blk-merge.c	block: fix inconsistency in I/O stat accounting code	16 years ago
blk-settings.c	pata_artop: typo	16 years ago
blk-softirq.c	generic-ipi: remove CSD_FLAG_WAIT	16 years ago
blk-sysfs.c	blktrace: add trace/ to /sys/block/sda	16 years ago
blk-tag.c	block/blk-tag.c: cleanup kernel-doc	16 years ago
blk-timeout.c	block: fix deadlock in blk_abort_queue() for drivers that readd to timeout list	16 years ago
blk.h	block: fix inconsistency in I/O stat accounting code	16 years ago
bsg.c	bsg: Remove bogus check against request_queue->max_sectors	16 years ago
cfq-iosched.c	cfq-iosched: don't let idling interfere with plugging	16 years ago
cmd-filter.c	[SCSI] Make scsi.h independent of the rest of the scsi includes	16 years ago
compat_ioctl.c	blktrace: support per-partition tracing	16 years ago
deadline-iosched.c	block: get rid of elevator_t typedef	16 years ago
elevator.c	block: fix inconsistency in I/O stat accounting code	16 years ago
genhd.c	block: add documentation for register_blkdev()	16 years ago
ioctl.c	block: don't take lock on changing ra_pages	16 years ago
noop-iosched.c	block: get rid of elevator_t typedef	16 years ago
scsi_ioctl.c	block: WARN in __blk_put_request() for potential bio leak	16 years ago