Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753483AbXJWUlv (ORCPT ); Tue, 23 Oct 2007 16:41:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752206AbXJWUlo (ORCPT ); Tue, 23 Oct 2007 16:41:44 -0400 Received: from rv-out-0910.google.com ([209.85.198.185]:41004 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752145AbXJWUln (ORCPT ); Tue, 23 Oct 2007 16:41:43 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=Bu7YGpJ/YT9yOv2ouL2faniaftu3Zctibyux7CPLbRxswx7vApbwVR/XIgSGWhKGxrsgxrVbSKBv24LxtUPmq1LSMqHtJSCbzKXDRPHZXClWAeYAW7kkfZcUFjExyxdCwlLXO40OxNSgUSzBdY7fMATgPhHvfJthAeoEESa9L7Q= Message-ID: <84144f020710231341p189435b1y5514e5be981b9b1c@mail.gmail.com> Date: Tue, 23 Oct 2007 23:41:42 +0300 From: "Pekka Enberg" To: "Christoph Lameter" Subject: Re: SLUB 0:1 SLAB (OOM during massive parallel kernel builds) Cc: "Alexey Dobriyan" , linux-kernel@vger.kernel.org, "Linux MM" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20071023181615.GA10377@martell.zuzino.mipt.ru> <84144f020710231304h6cba8626na4ab4bec0acda7a0@mail.gmail.com> X-Google-Sender-Auth: 243e0ef8ff04a1ea Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 878 Lines: 21 Hi Christoph, (I fixed linux-mm cc to kvack.org.) On 10/23/07, Christoph Lameter wrote: > The number of objects per page is reduced by enabling full debugging. That > triggers a potential of more order 1 allocations but we are failing at > order 0 allocs. Yeah, but we're _not failing_ when debugging is enabled. Thus, it's likely, that the _failing_ (non-debug) case has potential for more order 0 allocs, no? I am just guessing here but maybe it's slab_order() behaving differently from calculate_slab_order() so that we see more order 0 pressure in SLUB than SLAB? Pekka - 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/