From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx142.postini.com [74.125.245.142]) by kanga.kvack.org (Postfix) with SMTP id 337976B012C for ; Tue, 30 Apr 2013 13:34:36 -0400 (EDT) Date: Tue, 30 Apr 2013 10:34:33 -0700 From: Andi Kleen Subject: Re: [PATCH 1/2] Make the batch size of the percpu_counter configurable Message-ID: <20130430173433.GJ19487@tassilo.jf.intel.com> References: <0000013e5b24d2c5-9b899862-e2fd-4413-8094-4f1e5a0c0f62-000000@email.amazonses.com> <1367339009.27102.174.camel@schen9-DESK> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1367339009.27102.174.camel@schen9-DESK> Sender: owner-linux-mm@kvack.org List-ID: To: Tim Chen Cc: Christoph Lameter , Andrew Morton , Tejun Heo , Al Viro , Dave Hansen , linux-kernel , linux-mm > > What is this for and why does it have that alignmend? > > I was assuming that if batch is frequently referenced, it probably > should not share a cache line with the counters field. As long as they are both read-mostly it should be fine to share (cache line will just be SHARED) Padding would be only useful if one gets changed regularly. I don't think that's the case here? -Andi -- ak@linux.intel.com -- Speaking for myself only -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org