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authorSteven Rostedt <srostedt@redhat.com>2012-06-27 20:46:14 -0400
committerSteven Rostedt <rostedt@goodmis.org>2012-06-28 13:52:15 -0400
commit6d158a813efcd09661c23f16ddf7e2ff834cb20c (patch)
treec3937902e8ef5196638a9c31fd3b6280540a101d /include/linux/ftrace_event.h
parentb102f1d0f1cd0bb5ec82e5aeb1e33502d6ad6710 (diff)
downloadop-kernel-dev-6d158a813efcd09661c23f16ddf7e2ff834cb20c.zip
op-kernel-dev-6d158a813efcd09661c23f16ddf7e2ff834cb20c.tar.gz
tracing: Remove NR_CPUS array from trace_iterator
Replace the NR_CPUS array of buffer_iter from the trace_iterator with an allocated array. This will just create an array of possible CPUS instead of the max number specified. The use of NR_CPUS in that array caused allocation failures for machines that were tight on memory. This did not cause any failures to the system itself (no crashes), but caused unnecessary failures for reading the trace files. Added a helper function called 'trace_buffer_iter()' that returns the buffer_iter item or NULL if it is not defined or the array was not allocated. Some routines do not require the array (tracing_open_pipe() for one). Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/ftrace_event.h')
-rw-r--r--include/linux/ftrace_event.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 1aff183..af961d6 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -65,7 +65,7 @@ struct trace_iterator {
void *private;
int cpu_file;
struct mutex mutex;
- struct ring_buffer_iter *buffer_iter[NR_CPUS];
+ struct ring_buffer_iter **buffer_iter;
unsigned long iter_flags;
/* trace_seq for __print_flags() and __print_symbolic() etc. */
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