Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756909AbYKQMgB (ORCPT ); Mon, 17 Nov 2008 07:36:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754669AbYKQMfk (ORCPT ); Mon, 17 Nov 2008 07:35:40 -0500 Received: from smtp4.netcologne.de ([194.8.194.137]:57954 "EHLO smtp4.netcologne.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754325AbYKQMfj (ORCPT ); Mon, 17 Nov 2008 07:35:39 -0500 Date: Mon, 17 Nov 2008 13:35:36 +0100 From: Max Kellermann To: Trond Myklebust Cc: linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org Subject: Re: High load in 2.6.27, NFS / rpcauth_lookup_credcache()? Message-ID: <20081117123536.GA16539@squirrel.roonstrasse.net> Mail-Followup-To: Trond Myklebust , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org References: <20081022091207.GA12996@squirrel.roonstrasse.net> <20081023123628.GA18549@squirrel.roonstrasse.net> <1224773745.7625.4.camel@localhost> <20081024083913.GA15197@squirrel.roonstrasse.net> <1224871763.22672.33.camel@localhost> <20081027095843.GA10937@squirrel.roonstrasse.net> <1225122503.14242.12.camel@heimdal.trondhjem.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1225122503.14242.12.camel@heimdal.trondhjem.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 953 Lines: 24 On 2008/10/27 16:48, Trond Myklebust wrote: > OK. That points a finger at the garbage collector. Does the following > patch help at all? Hi Trond, the server's load seems to be a little bit lower with 2.6.27.6 plus your patch, but OProfile still gives me 45% in rpcauth_lookup_credcache(). See: 1060627 45.1474 (no location information) rpcauth_lookup_credcache 289362 12.3172 auth_generic.c:0 generic_match 31886 1.3573 page_alloc.c:0 get_page_from_freelist 23932 1.0187 (no location information) page_fault 22176 0.9440 (no location information) schedule 14613 0.6220 (no location information) __d_lookup [...] Max -- 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/