Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756057Ab3CYHez (ORCPT ); Mon, 25 Mar 2013 03:34:55 -0400 Received: from moltke.seatribe.se ([178.63.100.209]:55631 "EHLO moltke.seatribe.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753370Ab3CYHey (ORCPT ); Mon, 25 Mar 2013 03:34:54 -0400 Date: Mon, 25 Mar 2013 08:34:50 +0100 (CET) From: Fredrik Tolf To: Eric Wong cc: linux-kernel@vger.kernel.org Subject: Re: I/O blocked while dirty pages are being flushed In-Reply-To: <20130324065605.GA19984@dcvr.yhbt.net> Message-ID: References: <20130324065605.GA19984@dcvr.yhbt.net> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1158 Lines: 27 On Sun, 24 Mar 2013, Eric Wong wrote: > Fredrik Tolf wrote: >> It is worth noting, also, that this seems to be a situation >> introduced somewhere between 2.6.26 and 2.6.32, because I started >> noticing it when I upgraded from Debian 5.0 to 6.0. I've since tried >> it on 3.2.0, 3.5.4 and 3.7.1, and it appears in every version. >> However, I can't easily go back and bisect, because the new init >> scripts don't support kernels older than 2.6.32, unfortunately. > > So try lowering these sysctls to 2.6.26 levels (or lower) and see if > that helps. Thanks for the tip, but since the page dirtying happens in fast bursts for me, rather than gradually over time, that just caused the same sizes of writes to happen more often instead, which only made it worse. :) I'll continue investigating the stable-page route, instead, since that seems to be my exact problem. -- Fredrik Tolf -- 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/