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Shawn Du d0deef5b14 blktrace: support per-partition tracing 
Though one can specify '-d /dev/sda1' when using blktrace, it still
traces the whole sda.

To support per-partition tracing, when we start tracing, we initialize
bt->start_lba and bt->end_lba to the start and end sector of that
partition.

Note some actions are per device, thus we don't filter 0-sector events.

The original patch and discussion can be found here:
	http://marc.info/?l=linux-btrace&m=122949374214540&w=2

Signed-off-by: Shawn Du <duyuyang@gmail.com>
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: Jens Axboe <jens.axboe@oracle.com>
LKML-Reference: <49E42620.4050701@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 		2009-04-16 10:10:57 +02:00
..
Kconfig Merge branch 'linus' into tracing/core 2009-04-14 00:02:22 +02:00
Makefile tracing/events: move the ftrace event tracing code to core 2009-04-14 12:57:59 -04:00
blktrace.c blktrace: support per-partition tracing 2009-04-16 10:10:57 +02:00
ftrace.c tracing/events: move trace point headers into include/trace/events 2009-04-14 22:05:43 -04:00
kmemtrace.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
ring_buffer.c ring-buffer: add ring_buffer_discard_commit 2009-04-14 00:00:53 +02:00
trace.c tracing/events: add export symbols for trace events in modules 2009-04-14 12:58:01 -04:00
trace.h tracing/events: convert event call sites to use a link list 2009-04-14 12:58:00 -04:00
trace_boot.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_branch.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_clock.c tracing: fix four sparse warnings 2009-03-22 18:16:54 +01:00
trace_event_profile.c tracing/events: convert event call sites to use a link list 2009-04-14 12:58:00 -04:00
trace_event_types.h tracing/filters: add TRACE_EVENT_FORMAT_NOFILTER event macro 2009-04-14 00:00:51 +02:00
trace_events.c tracing/events: fix compile for modules disabled 2009-04-14 22:04:19 -04:00
trace_events_filter.c tracing/events: add export symbols for trace events in modules 2009-04-14 12:58:01 -04:00
trace_export.c tracing/filters: allow on-the-fly filter switching 2009-04-14 00:03:55 +02:00
trace_functions.c tracing/core: use appropriate waiting on trace_pipe 2009-02-18 01:40:20 +01:00
trace_functions_graph.c function-graph: add option to calculate graph time or not 2009-03-24 23:41:11 -04:00
trace_hw_branches.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_irqsoff.c tracing: have latency tracers set the latency format 2009-03-04 22:15:30 -05:00
trace_mmiotrace.c tracing: use macros to denote usec and nsec per second 2009-04-07 14:43:06 +02:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing/events: add export symbols for trace events in modules 2009-04-14 12:58:01 -04:00
trace_output.h tracing/events: move declarations from trace directory to core include 2009-04-14 12:57:58 -04:00
trace_power.c tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() 2009-04-14 00:00:56 +02:00
trace_printk.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_sched_switch.c tracing/events: move trace point headers into include/trace/events 2009-04-14 22:05:43 -04:00
trace_sched_wakeup.c tracing/events: move trace point headers into include/trace/events 2009-04-14 22:05:43 -04:00
trace_selftest.c tracing: keep the tracing buffer after self-test failure 2009-03-22 15:17:21 +01:00
trace_selftest_dynamic.c ftrace: fix dynamic ftrace selftest 2008-05-23 21:13:23 +02:00
trace_stack.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_stat.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00
trace_stat.h tracing: add handler to trace_stat 2009-03-24 23:22:58 -04:00
trace_syscalls.c tracing/syscalls: use a dedicated file header 2009-04-09 05:43:32 +02:00
trace_sysprof.c tracing/ftrace: factorize the tracing files creation 2009-04-07 14:43:07 +02:00
trace_workqueue.c Merge branch 'linus' into tracing/core 2009-04-07 13:47:45 +02:00