From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752087AbZH1Vs7 (ORCPT ); Fri, 28 Aug 2009 17:48:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752186AbZH1Vs7 (ORCPT ); Fri, 28 Aug 2009 17:48:59 -0400 Received: from mail-gx0-f205.google.com ([209.85.217.205]:35970 "EHLO mail-gx0-f205.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752155AbZH1Vs6 convert rfc822-to-8bit (ORCPT ); Fri, 28 Aug 2009 17:48:58 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=Mitb2xlNsWrfuKJQ+3Ly9VHp+DCdYdKAA6lyZWuO+5UNsbwe5LoqnV6OdIqdu6Gwzx fL+oTDkk1p5NpgnfQfm17KDGMyLrKq1C+CdkuBgD4R0HoTqfwm0zeDPhwrpIWGQ+fb8V OcN13jqlM2s22jAc0I1OrS4uA2n/8KwukC/VQ= MIME-Version: 1.0 In-Reply-To: <20090712080410.GA8512@localhost> References: <6afc6d4a0907111027w76234c8fv11ab77864515fdb0@mail.gmail.com> <20090712080410.GA8512@localhost> From: Fernando Silveira Date: Fri, 28 Aug 2009 18:48:40 -0300 Message-ID: <6afc6d4a0908281448s537aa315jcb79b27453cf4279@mail.gmail.com> Subject: Re: I/O and pdflush To: Wu Fengguang Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jul 12, 2009 at 05:04, Wu Fengguang wrote: > On Sat, Jul 11, 2009 at 02:27:25PM -0300, Fernando Silveira wrote: >> I'm having a hard time with an application that writes sequentially >> 250GB of non-stop data directly to a solid state disk (OCZ SSD CORE >> v2) device and I hope you can help me. The command "dd if=/dev/zero >> of=/dev/sdc bs=4M" reproduces the same symptoms I'm having and writes >> exactly as that application does. > > What's your kernel version?  Can the following patch help? Sorry for the delay, but I could not test it before. Unfortunately it did not help or change any symptoms at all. The kernel version I tested was a non-patched 2.6.30.1 version. Do you have any other hint? -- Fernando Silveira