Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932233AbVKWTaU (ORCPT ); Wed, 23 Nov 2005 14:30:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932235AbVKWTaU (ORCPT ); Wed, 23 Nov 2005 14:30:20 -0500 Received: from omx2-ext.sgi.com ([192.48.171.19]:36024 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S932233AbVKWTaS (ORCPT ); Wed, 23 Nov 2005 14:30:18 -0500 Date: Wed, 23 Nov 2005 11:30:10 -0800 (PST) From: Christoph Lameter To: Rohit Seth cc: akpm@osdl.org, torvalds@osdl.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH]: Free pages from local pcp lists under tight memory conditions In-Reply-To: <20051122161000.A22430@unix-os.sc.intel.com> Message-ID: References: <20051122161000.A22430@unix-os.sc.intel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 726 Lines: 15 On Tue, 22 Nov 2005, Rohit Seth wrote: > [PATCH]: This patch free pages (pcp->batch from each list at a time) from > local pcp lists when a higher order allocation request is not able to > get serviced from global free_list. Ummm.. One controversial idea: How about removing the complete pcp subsystem? Last time we disabled pcps we saw that the effect that it had was within noise ratio on AIM7. The lru lock taken without pcp is in the local zone and thus rarely contended. - 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/