From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx133.postini.com [74.125.245.133]) by kanga.kvack.org (Postfix) with SMTP id 8082E6B006C for ; Fri, 28 Sep 2012 10:04:27 -0400 (EDT) Date: Fri, 28 Sep 2012 14:04:25 +0000 From: Christoph Lameter Subject: Re: [PATCH] slab: Ignore internal flags in cache creation In-Reply-To: Message-ID: <0000013a0d314c3f-e5b12d01-7a99-4368-82a0-f5de4d46f804-000000@email.amazonses.com> References: <1348571866-31738-1-git-send-email-glommer@parallels.com> <00000139fe408877-40bc98e3-322c-4ba2-be72-e298ff28e694-000000@email.amazonses.com> <5062C029.308@parallels.com> <0000013a08020b4d-ecc22fc9-75e4-4f1d-8a76-5496a98d1df9-000000@email.amazonses.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: Glauber Costa , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michal Hocko , Pekka Enberg On Thu, 27 Sep 2012, David Rientjes wrote: > > This means touching another field from critical paths of the allocators. > > It would increase the cache footprint and therefore reduce performance. > > > > To clarify your statement, you're referring to the mm/slab.c allocation of > new slab pages and when debugging is enabled as "critical paths", correct? > We would disagree on that point. This is not debugging specific. Flags are also consulted to do RCU processing and other things. -- 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