From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 28 Oct 2007 15:10:03 +0200 (EET) From: Pekka J Enberg Subject: Re: [patch 04/10] SLUB: Avoid checking for a valid object before zeroing on the fast path In-Reply-To: <20071028033259.263401839@sgi.com> Message-ID: References: <20071028033156.022983073@sgi.com> <20071028033259.263401839@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Matthew Wilcox , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Sat, 27 Oct 2007, Christoph Lameter wrote: > The fast path always results in a valid object. Move the check > for the NULL pointer to the slow branch that calls > __slab_alloc. Only __slab_alloc can return NULL if there is no > memory available anymore and that case is exceedingly rare. Reviewed-by: Pekka Enberg -- 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