From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out28-58.mail.aliyun.com (out28-58.mail.aliyun.com [115.124.28.58]) (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 5DEA015E97 for ; Thu, 17 Jul 2025 00:18:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.28.58 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752711536; cv=none; b=tjoFUstnykihNcSL769liYV1JDgkHpqsfUXtLI40HowBIokHuK/AVMPgbELjVWTc9gJJ6vInmp28MbsSCh6gzZ6JiQHvOvFyBX+8rlDa2xFOxcjrCW0njvk4fGKCb8llKtcL77hpu5tIvfZiXZK1VJoIp9WG4wGFyROrfDxa7Ms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752711536; c=relaxed/simple; bh=sEXVW3e2An0cuif1MOznMEumWc8ijtexcZShz9xkhKI=; h=Date:From:To:Subject:Message-Id:MIME-Version:Content-Type; b=tYOVoklk9rUGc8G9FX8gCv6pk8hu/7GaoiSAKMHnPXannUI6avOdjFnstJGZ+qf/g0Ym/l/mRqx9a8nNb8YQrlqrkJGprR11KYTbJB+00bgpgGrDlr6u1Jz41ry9nmTAaOULTaIyOjRfOepshKgm9p5/dWxFpyhydB2Bcuz/kKI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=e16-tech.com; spf=pass smtp.mailfrom=e16-tech.com; arc=none smtp.client-ip=115.124.28.58 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=e16-tech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=e16-tech.com Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.dpICSn8_1752711212 cluster:ay29) by smtp.aliyun-inc.com; Thu, 17 Jul 2025 08:13:32 +0800 Date: Thu, 17 Jul 2025 08:13:33 +0800 From: Wang Yugui To: linux-xfs@vger.kernel.org Subject: a deadloop(?) when mkfs.xfs -o rtdev Message-Id: <20250717081332.E87F.409509F4@e16-tech.com> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.81.08 [en] Hi, There seems a deadloop(?) when mkfs.xfs -o rtdev. # mkfs.xfs -r rtdev=/dev/disk/by-id/ata-MZ7KM1T6HAJM00D3_S2CXNAAH600026 /dev/d isk/by-id/scsi-SHITACHI_HUSMH842_CLAR100_0LX0JWVA -f meta-data=/dev/disk/by-id/scsi-SHITACHI_HUSMH842_CLAR100_0LX0JWVA isize=512 agcount=20, agsize=1221072 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=1, rmapbt=0 = reflink=0 bigtime=1 inobtcount=1 nrext64=1 = exchange=0 data = bsize=4096 blocks=24421440, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1, parent=0 log =internal log bsize=4096 blocks=41799, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =/dev/disk/by-id/ata-MZ7KM1T6HAJM00D3_S2CXNAAH600026 extsz=4096 blocks=390703446, rtextents=390703446 Discarding blocks...Done. Discarding blocks...Done. It did not fishish after 10 mins. # pstack 5785 #0 0x00007f8df5efc01a in pread64 () from /lib64/libc.so.6 #1 0x0000557b7bbfe9c3 in __read_buf.constprop.0 () #2 0x0000557b7bbc3030 in libxfs_buf_read_map () #3 0x0000557b7bbfe1ae in libxfs_trans_read_buf_map.constprop () #4 0x0000557b7bbee7ef in xfs_rtbuf_get () #5 0x0000557b7bbf03d8 in libxfs_rtfree_extent () #6 0x0000557b7bbbb322 in parseproto.lto_priv () #7 0x0000557b7bbb7643 in main () And, 1) more chance happen when kernel 6.12.36, but yet not happen when kernel 6.6.93. 2) it happen on both xfsprogs-6.11.0 and xfsprogs-6.4. Best Regards Wang Yugui (wangyugui@e16-tech.com) 2025/07/17