Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754676AbXKVVVG (ORCPT ); Thu, 22 Nov 2007 16:21:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752317AbXKVVUz (ORCPT ); Thu, 22 Nov 2007 16:20:55 -0500 Received: from ogre.sisk.pl ([217.79.144.158]:55118 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752313AbXKVVUy (ORCPT ); Thu, 22 Nov 2007 16:20:54 -0500 From: "Rafael J. Wysocki" To: tvrtko.ursulin@sophos.com Subject: Re: [2.6.24-rc] pdflush stuck in D state Date: Thu, 22 Nov 2007 22:39:00 +0100 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) Cc: linux-kernel@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200711222239.00866.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4155 Lines: 90 On Thursday, 22 of November 2007, tvrtko.ursulin@sophos.com wrote: > linux-kernel-owner@vger.kernel.org wrote on 22/11/2007 16:28:22: > > > linux-kernel-owner@vger.kernel.org wrote on 22/11/2007 16:34:01: > > > > > On Thursday, 22 of November 2007, Tvrtko A. Ursulin wrote: > > > > > > > > Hi all, > > > > > > > > So as the subject says - pdflush is stuck i D state which means > > > constant load > > > > average of at least one: > > > > > > > > root 151 0.0 0.0 0 0 ? D Nov20 0:33 > > [pdflush] > > > > > > Hm, this is supposed to be fixed. Please see: > > > http://bugzilla.kernel.org/show_bug.cgi?id=9323 > > > > Doesn't look like the same bug to me - I have only ever seen pdflush get > > > stuck in D, not random processes. > > > > Also, I can confirm that -rc3 I am running contains the patch referenced > > > in your bugzilla link above. > > Here is a trace for good and bad pdflush processes: > > Nov 22 16:35:09 oxygene kernel: ======================= > Nov 22 16:35:09 oxygene kernel: pdflush S c014fe4e 0 150 2 > Nov 22 16:35:09 oxygene kernel: 00000000 00000046 00000000 c014fe4e > f7c30fa4 c014f9c6 f7ce8560 f7ce869c > Nov 22 16:35:09 oxygene kernel: c201e100 00000001 fffffffc 00000002 > 00000000 00000000 00000000 00000000 > Nov 22 16:35:09 oxygene kernel: 00000021 f7c30fc8 c014fe4e 00000000 > 00000000 c014ff09 00000202 f7ce8560 > Nov 22 16:35:09 oxygene kernel: Call Trace: > Nov 22 16:35:09 oxygene kernel: [pdflush+0/434] pdflush+0x0/0x1b2 > Nov 22 16:35:09 oxygene kernel: [background_writeout+125/173] > background_writeout+0x7d/0xad > Nov 22 16:35:09 oxygene kernel: [pdflush+0/434] pdflush+0x0/0x1b2 > Nov 22 16:35:09 oxygene kernel: [pdflush+187/434] pdflush+0xbb/0x1b2 > Nov 22 16:35:09 oxygene kernel: [kthread+56/96] kthread+0x38/0x60 > Nov 22 16:35:09 oxygene kernel: [kthread+0/96] kthread+0x0/0x60 > Nov 22 16:35:09 oxygene kernel: [kernel_thread_helper+7/16] > kernel_thread_helper+0x7/0x10 > Nov 22 16:35:09 oxygene kernel: ======================= > Nov 22 16:35:09 oxygene kernel: pdflush D f7c3aef4 0 151 2 > Nov 22 16:35:09 oxygene kernel: 0b83b953 00000046 00000002 f7c3aef4 > f7c3aeec 00000000 f7ce8ac0 f7ce8bfc > Nov 22 16:35:09 oxygene kernel: c201e100 00000001 f7c3af18 0b83b9cc > f7c3af18 00000003 00000000 00000001 > Nov 22 16:35:09 oxygene kernel: 00000000 f7c3af18 0b83b9cc f7c3af70 > 00000000 c027ddb7 f781e000 c010490c > Nov 22 16:35:09 oxygene kernel: Call Trace: > Nov 22 16:35:09 oxygene kernel: [schedule_timeout+112/141] > schedule_timeout+0x70/0x8d > Nov 22 16:35:09 oxygene kernel: [apic_timer_interrupt+40/48] > apic_timer_interrupt+0x28/0x30 > Nov 22 16:35:09 oxygene kernel: [process_timeout+0/5] > process_timeout+0x0/0x5 > Nov 22 16:35:09 oxygene kernel: [schedule_timeout+107/141] > schedule_timeout+0x6b/0x8d > Nov 22 16:35:09 oxygene kernel: [io_schedule_timeout+27/36] > io_schedule_timeout+0x1b/0x24 > Nov 22 16:35:09 oxygene kernel: [congestion_wait+80/100] > congestion_wait+0x50/0x64 > Nov 22 16:35:09 oxygene kernel: [autoremove_wake_function+0/53] > autoremove_wake_function+0x0/0x35 > Nov 22 16:35:09 oxygene kernel: [pdflush+0/434] pdflush+0x0/0x1b2 > Nov 22 16:35:09 oxygene kernel: [wb_kupdate+152/219] wb_kupdate+0x98/0xdb > Nov 22 16:35:09 oxygene kernel: [pdflush+282/434] pdflush+0x11a/0x1b2 > Nov 22 16:35:09 oxygene kernel: [wb_kupdate+0/219] wb_kupdate+0x0/0xdb > Nov 22 16:35:09 oxygene kernel: [kthread+56/96] kthread+0x38/0x60 > Nov 22 16:35:09 oxygene kernel: [kthread+0/96] kthread+0x0/0x60 > Nov 22 16:35:09 oxygene kernel: [kernel_thread_helper+7/16] > kernel_thread_helper+0x7/0x10 > Nov 22 16:35:09 oxygene kernel: ======================= Can you attach these traces to the Bugzilla entry at: http://bugzilla.kernel.org/show_bug.cgi?id=9441 , please? Thanks, Rafael - 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/