Commit 985023de authored Mar 25, 2010 by Richard Kennedy Committed by Steven Rostedt Jul 20, 2010

trace: Reorder struct ring_buffer_per_cpu to remove padding on 64bit



Reorder structure to remove 8 bytes of padding on 64 bit builds.
This shrinks the size to 128 bytes so allowing allocation from a smaller
slab & needed one fewer cache lines.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
LKML-Reference: <1269516456.2054.8.camel@localhost>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

parent e870e9a1

kernel/trace/ring_buffer.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -443,6 +443,7 @@ int ring_buffer_print_page_header(struct trace_seq *s)
		*/
		struct ring_buffer_per_cpu {
		int cpu;
		atomic_t record_disabled;
		struct ring_buffer *buffer;
		spinlock_t reader_lock; /* serialize readers */
		arch_spinlock_t lock;
		@@ -462,7 +463,6 @@ struct ring_buffer_per_cpu {
		unsigned long read;
		u64 write_stamp;
		u64 read_stamp;
		atomic_t record_disabled;
		};

		struct ring_buffer {