Lai Jiangshan 93cfb3c9fd tracing: fix splice return too large ...

I got these from strace:

 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 12288
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 12288
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 12288
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 16384
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 8192
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 8192
 splice(0x3, 0, 0x5, 0, 0x1000, 0x1) = 8192

I wanted to splice_read 4096 bytes, but it returns 8192 or larger.

It is because the return value of tracing_buffers_splice_read()
does not include "zero out any left over data" bytes.

But tracing_buffers_read() includes these bytes, we make them
consistent.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
LKML-Reference: <49D46674.9030804@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-04-10 12:44:46 +02:00

..

blktrace.c

blktrace: pass the right pointer to kfree()

2009-04-09 05:52:40 +02:00

events.c

ftrace: event profile hooks

2009-03-20 10:17:07 +01:00

ftrace.c

function-graph: allow unregistering twice

2009-04-01 14:47:42 +02:00

Kconfig

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

kmemtrace.c

kmemtrace: small cleanups

2009-04-03 12:23:09 +02:00

Makefile

tracing: add per-event filtering

2009-03-22 18:38:46 +01:00

ring_buffer.c

ring-buffer: do not remove reader page from list on ring buffer free

2009-04-01 14:47:53 +02:00

trace_boot.c

tracing: Introduce trace_buffer_{lock_reserve,unlock_commit}

2009-02-06 01:01:41 +01:00

trace_branch.c

tracing: remove funky whitespace in the trace code

2009-03-10 14:13:14 -04:00

trace_clock.c

tracing: fix four sparse warnings

2009-03-22 18:16:54 +01:00

trace_event_profile.c

ftrace: event profile hooks

2009-03-20 10:17:07 +01:00

trace_event_types.h

tracing: remove recording function depth from trace_printk

2009-03-19 15:58:47 -04:00

trace_events_filter.c

tracing/filters: disallow integer values for string filters and vice versa

2009-03-24 08:26:52 +01:00

trace_events_stage_1.h

tracing: update comments to match event code macros

2009-03-10 13:12:58 -04:00

trace_events_stage_2.h

tracing: add run-time field descriptions for event filtering

2009-03-22 18:11:22 +01:00

trace_events_stage_3.h

tracing/events: don't discard an event after commit

2009-03-23 09:22:15 +01:00

trace_events.c

tracing: filter fix for TRACE_EVENT_FORMAT events

2009-03-26 09:13:14 +01:00

trace_export.c

ftrace: Correct a text align for event format output

2009-04-07 14:02:42 +02:00

trace_functions_graph.c

function-graph: moved the timestamp from arch to generic code

2009-03-24 09:31:34 -04:00

trace_functions.c

tracing/core: use appropriate waiting on trace_pipe

2009-02-18 01:40:20 +01:00

trace_hw_branches.c

tracing/hw-branch-tracing: convert bts-tracer mutex to a spinlock

2009-02-25 09:16:01 +01:00

trace_irqsoff.c

tracing: have latency tracers set the latency format

2009-03-04 22:15:30 -05:00

trace_mmiotrace.c

tracing: remove recording function depth from trace_printk

2009-03-19 15:58:47 -04:00

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: fix incorrect return type of ns2usecs()

2009-04-07 13:59:23 +02:00

trace_output.h

trace: make argument 'mem' of trace_seq_putmem() const

2009-03-31 17:45:13 +02:00

trace_power.c

tracing: make power tracer start/stop methods lighter weight

2009-03-17 23:12:11 -04:00

trace_printk.c

tracing: remove recording function depth from trace_printk

2009-03-19 15:58:47 -04:00

trace_sched_switch.c

ftrace: Add check of sched_stopped for probe_sched_wakeup

2009-04-07 14:01:11 +02:00

trace_sched_wakeup.c

tracing: remove CALLER_ADDR2 from wakeup tracer

2009-04-07 13:58:54 +02:00

trace_selftest_dynamic.c

ftrace: fix dynamic ftrace selftest

2008-05-23 21:13:23 +02:00

trace_selftest.c

tracing: keep the tracing buffer after self-test failure

2009-03-22 15:17:21 +01:00

trace_stack.c

tracing: left align location header in stack_trace

2009-03-13 00:00:58 -04:00

trace_stat.c

trace_stat: keep original order

2009-03-25 18:32:34 +01:00

trace_stat.h

tracing/ftrace: separate events tracing and stats tracing engine

2009-01-14 12:11:37 +01:00

trace_syscalls.c

tracing/syscalls: use a dedicated file header

2009-04-09 05:43:32 +02:00

trace_sysprof.c

tracing: make all file_operations const

2009-03-05 21:46:40 -05:00

trace_workqueue.c

trace_workqueues: fix empty line's output

2009-03-25 18:32:35 +01:00

trace.c

tracing: fix splice return too large

2009-04-10 12:44:46 +02:00

trace.h

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-07 14:10:10 -07:00