From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932911AbXCFIv6 (ORCPT ); Tue, 6 Mar 2007 03:51:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933085AbXCFIv6 (ORCPT ); Tue, 6 Mar 2007 03:51:58 -0500 Received: from cantor.suse.de ([195.135.220.2]:38754 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932911AbXCFIv6 convert rfc822-to-8bit (ORCPT ); Tue, 6 Mar 2007 03:51:58 -0500 From: Oliver Neukum Organization: Novell To: ebuddington@wesleyan.edu, "list, USB" Subject: Re: khubd and ent:sda1 sucking CPU with reiser4 + USB HD Date: Tue, 6 Mar 2007 09:52:02 +0100 User-Agent: KMail/1.9.1 Cc: linux-kernel@vger.kernel.org References: <20070306041337.GA9198@pool-71-123-121-36.spfdma.east.verizon.net> In-Reply-To: <20070306041337.GA9198@pool-71-123-121-36.spfdma.east.verizon.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200703060952.02291.oneukum@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Dienstag, 6. März 2007 05:13 schrieb Eric Buddington: > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]: > WARNING: Flushing like mad: 16384 > reiser4[khubd(163)]: commit_current_atom (fs/reiser4/txnmgr.c:1049)[nikita-3176]: > WARNING: Flushing like mad: 32768 > ... > > Most problematically, khubd and ent:sda1! are conspiring to suck 100% > CPU time, even after powering off the drive. A bunch of processes are > stuck in 'D' state, possibly because they're trying to access the dead > disk, which won't umount ("device is busy"). It looks like khubd allocates memory and enters reiser4. Possibly we have GFP_KERNEL in khubd where we should have GFP_NOIO or reiser4 has a problem dealing with IO failures. Regards Oliver