From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6876C2D0A8 for ; Wed, 23 Sep 2020 09:21:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 66F0A20719 for ; Wed, 23 Sep 2020 09:21:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="H9oFPP6n" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726497AbgIWJVH (ORCPT ); Wed, 23 Sep 2020 05:21:07 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:58232 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726315AbgIWJVG (ORCPT ); Wed, 23 Sep 2020 05:21:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600852864; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ib5eaN3zwZBJ0n0g+vmHq1Fy0ncjCr6a75WconyvknE=; b=H9oFPP6nmmeklASSrsIL/rx8BabXvaHohGp2R2IcEcR3viJnS4v6O0EIBQpP+5WCyE1iAw 6eK7/A/PlXSHGM5Y4uDE1PrF/qQbDnsyca1mHYWi3WhzuwhHcUy2DRUlTepH4ZcWdbb/jJ X2ihveTbkfFI1iEQScV5njiYCUJjxGk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-346-T1Ze7lAYNH6_6JQQvmG5RA-1; Wed, 23 Sep 2020 05:21:00 -0400 X-MC-Unique: T1Ze7lAYNH6_6JQQvmG5RA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6BA791084D73; Wed, 23 Sep 2020 09:20:58 +0000 (UTC) Received: from file01.intranet.prod.int.rdu2.redhat.com (file01.intranet.prod.int.rdu2.redhat.com [10.11.5.7]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DD3F419D61; Wed, 23 Sep 2020 09:20:57 +0000 (UTC) Received: from file01.intranet.prod.int.rdu2.redhat.com (localhost [127.0.0.1]) by file01.intranet.prod.int.rdu2.redhat.com (8.14.4/8.14.4) with ESMTP id 08N9Kv19004020; Wed, 23 Sep 2020 05:20:57 -0400 Received: from localhost (mpatocka@localhost) by file01.intranet.prod.int.rdu2.redhat.com (8.14.4/8.14.4/Submit) with ESMTP id 08N9KtEI004016; Wed, 23 Sep 2020 05:20:55 -0400 X-Authentication-Warning: file01.intranet.prod.int.rdu2.redhat.com: mpatocka owned process doing -bs Date: Wed, 23 Sep 2020 05:20:55 -0400 (EDT) From: Mikulas Patocka X-X-Sender: mpatocka@file01.intranet.prod.int.rdu2.redhat.com To: "Theodore Ts'o" , Andreas Dilger , linux-ext4@vger.kernel.org cc: Dan Williams , Linus Torvalds , Alexander Viro , Andrew Morton , Vishal Verma , Dave Jiang , Ira Weiny , Matthew Wilcox , Jan Kara , Eric Sandeen , Dave Chinner , Linux Kernel Mailing List , linux-fsdevel Subject: A bug in ext4 with big directories (was: NVFS XFS metadata) In-Reply-To: <20200923024528.GD12096@dread.disaster.area> Message-ID: References: <20200922050314.GB12096@dread.disaster.area> <20200923024528.GD12096@dread.disaster.area> User-Agent: Alpine 2.02 (LRH 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi There seems to be a bug in ext4 - when I create very large directory, ext4 fails with -ENOSPC despite the fact that there is plenty of free space and free inodes on the filesystem. How to reproduce: download the program dir-test: http://people.redhat.com/~mpatocka/benchmarks/dir-test.c # modprobe brd rd_size=67108864 # mkfs.ext4 /dev/ram0 # mount -t ext4 /dev/ram0 /mnt/test # dir-test /mnt/test/ 8000000 8000000 deleting: 7999000 2540000 file 2515327 can't be created: No space left on device # df /mnt/test /dev/ram0 65531436 633752 61525860 2% /mnt/test # df -i /mnt/test /dev/ram0 4194304 1881547 2312757 45% /mnt/test (I tried to increase journal size, but it has no effect on this bug) Mikulas