From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from postout2.mail.lrz.de (postout2.mail.lrz.de [129.187.255.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6AD0D36EAA7 for ; Mon, 30 Mar 2026 21:17:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=129.187.255.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774905475; cv=none; b=N9n3E1Ujim1J+tylfI1Yby21PqW1cfRLlTCg5ySVa1iSi/H2tLo97Pj3vQyUf1Ipftt8LbKppcBhhRaklUnYbYtrCQFiq2l//SKQD5dXtPzHKM6NpSfBZY6JZgBJQ/WFOypviXmYEW6GLoC5WvYL8wJCgoAs+axElzxPvc7B3cA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774905475; c=relaxed/simple; bh=WwWooCoexibAG0fWo17ibT4hS8cO+WWH9RDin6qPDYc=; h=Message-ID:Subject:From:To:Date:Content-Type:MIME-Version; b=tXM9eu8rNZ8+nsEtPr4a8de8DBV9VI9+yZM95S/iXgl+gWLkgn7mROGLyTQ5vgAY5dNWMjS36I72aMgX1ioEk9nIBwIhhqmj/gaeXC0EN18oKALUPHYlJrFR/6hfl4Kexakgc+EZ+L2COffA/pwVETTp1/2IAGR0nkOQXL5AXDk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lmu.de; spf=pass smtp.mailfrom=lmu.de; dkim=pass (2048-bit key) header.d=lmu.de header.i=@lmu.de header.b=ORD1bJnA; arc=none smtp.client-ip=129.187.255.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lmu.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lmu.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lmu.de header.i=@lmu.de header.b="ORD1bJnA" Received: from lxmhs52.srv.lrz.de (localhost [127.0.0.1]) by postout2.mail.lrz.de (Postfix) with ESMTP id 4fl3nC00qHzyTL for ; Mon, 30 Mar 2026 23:10:38 +0200 (CEST) Authentication-Results: postout.lrz.de (amavis); dkim=pass (2048-bit key) reason="pass (just generated, assumed good)" header.d=lmu.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lmu.de; h= mime-version:user-agent:content-transfer-encoding:content-type :content-type:organization:date:date:from:from:subject:subject :message-id:received:received; s=lm-postout21; t=1774905038; bh= WwWooCoexibAG0fWo17ibT4hS8cO+WWH9RDin6qPDYc=; b=ORD1bJnABqbbU+HN MsFmC6KNRJNC1roCHIoEIR9NA8Otz3mBf7GGgXRYB+J8mtlBo7I1FJYhntE4bbg7 X4lKLIoaEAyRmcEri7gifq2Gp/0XfA57B6iGQEXBYiBfL0WdT17SPFsIxBnrwYYX XuG7A7PW8SPVH+zKhiljw1qT5pZB/yFiGHK8GGmtDvzUP0Hmmo5gfaBy4gOlQV53 ryEA5WhCOSbkTPSmIwJDhMjIcZjjOtzKdTtFrRBYbLf+CKsNZ432O8l9Ngs2jdqQ ffLQTEIM9eJlYS1xEY+bClbCTZKQwkSuhull+Pw+9AesxYewx0+lgPH5QP07uuyj dJZ5Xg== X-Virus-Scanned: by amavisd-new at lrz.de in lxmhs52.srv.lrz.de X-Spam-Flag: NO X-Spam-Score: -2.872 X-Spam-Level: Received: from postout2.mail.lrz.de ([127.0.0.1]) by lxmhs52.srv.lrz.de (lxmhs52.srv.lrz.de [127.0.0.1]) (amavis, port 20024) with LMTP id NbomYI4WaP-4 for ; Mon, 30 Mar 2026 23:10:38 +0200 (CEST) Received: from [IPv6:2003:cd:df16:9b00:a661:c61e:e1ae:f175] (p200300cddf169b00a661c61ee1aef175.dip0.t-ipconnect.de [IPv6:2003:cd:df16:9b00:a661:c61e:e1ae:f175]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by postout2.mail.lrz.de (Postfix) with ESMTPSA id 4fl3n83jRwzyTZ for ; Mon, 30 Mar 2026 23:10:36 +0200 (CEST) Message-ID: <4c1c079ff186368b087d01be870774be4e2bba5b.camel@lmu.de> Subject: Space key logical 1048576 length 4194304 has no corresponding block group From: Christoph Anton Mitterer To: Btrfs BTRFS Date: Mon, 30 Mar 2026 23:10:36 +0200 Organization: =?ISO-8859-1?Q?Ludwig-Maximilians-Unive?= =?ISO-8859-1?Q?rsit=E4t?= =?ISO-8859-1?Q?_M=FCnchen?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-9 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hey. This is on 6.19.10 with progs 6.19.1: # btrfs check /dev/mapper/data-a-1 ; echo $? ; beep Opening filesystem to check... Checking filesystem on /dev/mapper/data-a-1 UUID: ff14e046-d72c-4671-b30a-6ec17c58a0f1 [1/8] checking log skipped (none written) [2/8] checking root items [3/8] checking extents [4/8] checking free space tree Space key logical 1048576 length 4194304 has no corresponding block group Space key logical 5242880 length 8388608 has no corresponding block group [5/8] checking fs roots [6/8] checking only csums items (without verifying data) [7/8] checking root refs [8/8] checking quota groups skipped (not enabled on this FS) found 15744973131776 bytes used, error(s) found total csum bytes: 15347594276 total tree bytes: 29036593152 total fs tree bytes: 11069259776 total extent tree bytes: 811499520 btree space waste bytes: 3687899842 file data blocks allocated: 22699997167616 referenced 18205200039936 1 May have been there earlier (Debian was until yesterday or so on progs 6.18). Is this something to worry about (the fs is very precious for me, though I do have backups)? The fs never crashed so I wonder how these free space tree corruptions come to happen, any rare bug perhaps? Should I re-generate the free space tree (which currently is however not really possible though, due to [0]). So not sure whether I still can/should use that fs until a fix for that is available? Thanks, Chris. [0] https://lore.kernel.org/linux-btrfs/89188b7b8b5a1f9bb64af37777aec906134= ad75c.camel@scientia.org/