Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759400Ab0GWMK2 (ORCPT ); Fri, 23 Jul 2010 08:10:28 -0400 Received: from hera.kernel.org ([140.211.167.34]:43020 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759265Ab0GWMKX (ORCPT ); Fri, 23 Jul 2010 08:10:23 -0400 Date: Fri, 23 Jul 2010 12:10:03 GMT From: tip-bot for Richard Kennedy Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, rostedt@goodmis.org, richard@rsk.demon.co.uk, tglx@linutronix.de Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, rostedt@goodmis.org, tglx@linutronix.de, richard@rsk.demon.co.uk In-Reply-To: <1269516456.2054.8.camel@localhost> References: <1269516456.2054.8.camel@localhost> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] trace: Reorder struct ring_buffer_per_cpu to remove padding on 64bit Message-ID: Git-Commit-ID: 985023dee6e212493831431ba2e3ce8918f001b2 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Fri, 23 Jul 2010 12:10:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1671 Lines: 45 Commit-ID: 985023dee6e212493831431ba2e3ce8918f001b2 Gitweb: http://git.kernel.org/tip/985023dee6e212493831431ba2e3ce8918f001b2 Author: Richard Kennedy AuthorDate: Thu, 25 Mar 2010 11:27:36 +0000 Committer: Steven Rostedt CommitDate: Tue, 20 Jul 2010 21:58:44 -0400 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 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 { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/