]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: b0f1294) | patch
tracing/syscall: Avoid perf_trace_buf_*() if sys_data->perf_events is empty
authorOleg Nesterov <oleg@redhat.com>
Mon, 17 Jun 2013 17:02:07 +0000 (19:02 +0200)
committerSteven Rostedt <rostedt@goodmis.org>
Fri, 19 Jul 2013 01:31:28 +0000 (21:31 -0400)
commit8f55b34b5fc3568259c800232238b530fb48019b
treea3247de06867de070ae709bcdca412e0a7900d62tree | snapshot
parentb0f1294f94b63833862a44d8f9ae616c8c7bcedecommit | diff
tracing/syscall: Avoid perf_trace_buf_*() if sys_data->perf_events is empty

perf_trace_buf_prepare() + perf_trace_buf_submit(head, task => NULL)
make no sense if hlist_empty(head). Change perf_syscall_enter/exit()
to check sys_data->{enter,exit}_event->perf_events beforehand.

Link: http://lkml.kernel.org/r/20130617170207.GA19806@redhat.com
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace_syscalls.c diff | blob | history
Linux Kernel Source Tree.