From: Theodore Tso Subject: Re: EXT4 ENOSPC Bug Date: Wed, 18 Feb 2009 16:29:57 -0500 Message-ID: <20090218212957.GR3600@mini-me.lan> References: <20090216162028.3032666a@lithium.local.net> <200811291418.24672.andres@anarazel.de> <200812100108.04163.andres@anarazel.de> <49994FEF.2020908@anarazel.de> <20090216150156.GD22619@mini-me.lan> <499985C7.8010302@anarazel.de> <20090216190001.GB11788@mini-me.lan> <499AF598.7080400@anarazel.de> <499C7B41.1090800@anarazel.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Alex Buell , adilger@sun.com, LKML , linux-ext4@vger.kernel.org, Jonathan Bastien-Filiatrault , "Aneesh Kumar K.V" To: Andres Freund Return-path: Received: from THUNK.ORG ([69.25.196.29]:52147 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760312AbZBRWsZ (ORCPT ); Wed, 18 Feb 2009 17:48:25 -0500 Content-Disposition: inline In-Reply-To: <499C7B41.1090800@anarazel.de> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed, Feb 18, 2009 at 10:18:57PM +0100, Andres Freund wrote: > On one of the machines I got several thousand of: > > [10379.575904] ext4: find_group_flex failed, fallback succeeded dir 416319 > [10379.576002] ext4: find_group_flex failed, fallback succeeded dir 416319 > [10379.579981] ext4: find_group_flex failed, fallback succeeded dir 416319 > [10379.580097] ext4: find_group_flex failed, fallback succeeded dir 416319 > (with different directories) Ok, that's good. Good to know the workaround works. Can you send me a dumpe2fs of the filesystem in question? I'm curious what was going on... > No userspace visible behaviour. > > So it seems you were right. It seems sensible to put that patch without > printk in the kernel until the issue is fully solved... Thanks for the report. I'll push the workaround patch to Linus for 2.6.29 to avoid this problem for now. I recently sent to linux-ext4 for comment a patch to revamp the Orlov allocator for flex_bg and to use that instead of find_group_flex(), but no way that's going into 2.6.29 at this point.... - Ted