Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756733Ab1FGPdn (ORCPT ); Tue, 7 Jun 2011 11:33:43 -0400 Received: from anchor-post-3.mail.demon.net ([195.173.77.134]:58591 "EHLO anchor-post-3.mail.demon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756714Ab1FGPdk (ORCPT ); Tue, 7 Jun 2011 11:33:40 -0400 Subject: [PATCH] perf events: remove 64bit alignment padding from perf_event_context From: Richard Kennedy To: Peter Zijlstra Cc: Paul Mackerras , Ingo Molnar , lkml Date: Tue, 07 Jun 2011 16:33:38 +0100 Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.0.2 (3.0.2-1.fc15) Content-Transfer-Encoding: 7bit Message-ID: <1307460819.1950.5.camel@castor.rsk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 952 Lines: 37 Reorder perf_event_context to remove 8 bytes of 64 bit alignment padding shrinking its size to 192 bytes, allowing it to fit into a smaller slab and use one fewer cache lines. Signed-off-by: Richard Kennedy --- patch against v3.0-rc2 compiled & tested on x86_64 regards Richard diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 3412684..9d5b3d5 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -919,8 +919,8 @@ struct perf_event_context { u64 parent_gen; u64 generation; int pin_count; - struct rcu_head rcu_head; int nr_cgroups; /* cgroup events present */ + struct rcu_head rcu_head; }; /* -- 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/