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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>
This commit is contained in:
Richard Kennedy 2010-03-25 11:27:36 +00:00 committed by Steven Rostedt
parent e870e9a124
commit 985023dee6
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/ring_buffer.c
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@ -443,6 +443,7 @@ int ring_buffer_print_page_header(struct trace_seq *s)
*/ */
struct ring_buffer_per_cpu { struct ring_buffer_per_cpu {
int cpu; int cpu;
atomic_t record_disabled;
struct ring_buffer *buffer; struct ring_buffer *buffer;
spinlock_t reader_lock; /* serialize readers */ spinlock_t reader_lock; /* serialize readers */
arch_spinlock_t lock; arch_spinlock_t lock;
@ -462,7 +463,6 @@ struct ring_buffer_per_cpu {
unsigned long read; unsigned long read;
u64 write_stamp; u64 write_stamp;
u64 read_stamp; u64 read_stamp;
atomic_t record_disabled;
}; };
struct ring_buffer { struct ring_buffer {