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| author |   Lai Jiangshan <laijs@cn.fujitsu.com> | 2009-04-02 15:17:08 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-04-10 12:44:46 +0200 |
| commit | 93cfb3c9fd83d877a8f1ffad9ff862b617b32828 (patch) | |
| tree | a88753a44117b9dcfdd65bb0d0572eb5b945e961 /kernel/trace/Kconfig | |
| parent | tracing: update file->f_pos when splice(2) it (diff) | |
| download | linux-dev-93cfb3c9fd83d877a8f1ffad9ff862b617b32828.tar.xz linux-dev-93cfb3c9fd83d877a8f1ffad9ff862b617b32828.zip | |
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>
Diffstat (limited to 'kernel/trace/Kconfig')
0 files changed, 0 insertions, 0 deletions