Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758204AbXJYCn0 (ORCPT ); Wed, 24 Oct 2007 22:43:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752093AbXJYCnT (ORCPT ); Wed, 24 Oct 2007 22:43:19 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:57840 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750916AbXJYCnS (ORCPT ); Wed, 24 Oct 2007 22:43:18 -0400 Date: Wed, 24 Oct 2007 19:43:17 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Nick Piggin cc: Alexey Dobriyan , Mel Gorman , Pekka Enberg , linux-kernel@vger.kernel.org, linux-mm@vger.kernel.org Subject: Re: SLUB 0:1 SLAB (OOM during massive parallel kernel builds) In-Reply-To: <200710251234.01440.nickpiggin@yahoo.com.au> Message-ID: References: <20071023181615.GA10377@martell.zuzino.mipt.ru> <20071024192849.GA3206@martell.zuzino.mipt.ru> <200710251234.01440.nickpiggin@yahoo.com.au> 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: 877 Lines: 22 On Thu, 25 Oct 2007, Nick Piggin wrote: > > Ummm... all unreclaimable is set! Are you mlocking the pages in memory? Or > > what causes this? All pages under writeback? What is the dirty ratio set > > to? > > Why is SLUB behaving differently, though. Nore sure. Are we really sure that this does not occur using SLAB? > Memory efficiency wouldn't be the reason, would it? I mean, SLUB > should be more efficient than SLAB, plus have less data lying around > in queues. SLAB may have data around in queues which (if the stars align the right way) may allow it to go longer without having to get a page from the page allocator. - 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/