From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756780Ab0GVUZE (ORCPT ); Thu, 22 Jul 2010 16:25:04 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123]:48992 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754963Ab0GVUYy (ORCPT ); Thu, 22 Jul 2010 16:24:54 -0400 X-Authority-Analysis: v=1.1 cv=Bg1eF82PU/BBLXqN4uYnzFVuDnL6ar87Ns1E9VhfbEo= c=1 sm=0 a=3Hci3Pwzf60A:10 a=GzHTLUccyWwA:10 a=gMqfjgEr1zLu/65IO0LwxA==:17 a=YoxM-lRnAAAA:8 a=meVymXHHAAAA:8 a=3Xy-S3sgpcIMMfG8J50A:9 a=LYXkWRPJ5EVuAl7SqTQA:7 a=4L51aUizZdLjfybj2lh8SDgVAvMA:4 a=jeBq3FmKZ4MA:10 a=1g7oDzIvZWB_8K9f:21 a=rSaPSPL2myXWIg54:21 a=gMqfjgEr1zLu/65IO0LwxA==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.89.75 Message-Id: <20100722202452.515464451@goodmis.org> User-Agent: quilt/0.48-1 Date: Thu, 22 Jul 2010 16:24:13 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Frederic Weisbecker , Richard Kennedy Subject: [PATCH 2/7] trace: Reorder struct ring_buffer_per_cpu to remove padding on 64bit References: <20100722202411.920807480@goodmis.org> Content-Disposition: inline; filename=0002-trace-Reorder-struct-ring_buffer_per_cpu-to-remove-p.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Richard Kennedy 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 LKML-Reference: <1269516456.2054.8.camel@localhost> Signed-off-by: Steven Rostedt --- kernel/trace/ring_buffer.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 28d0615..3632ce8 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -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 { -- 1.7.1