From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outgoing.selfhost.de (mordac.selfhost.de [82.98.82.6]) (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 EE4521DE3AE for ; Mon, 7 Oct 2024 18:54:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.98.82.6 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728327276; cv=none; b=e1ZsJJXlavpbdQNvzm3V/nyFp5CSRbidsBT3wOhHw/0//sAxCx9XpeH1fakSG+RE/W8x2XMaqXUzhgtL1zZ/L4tdhh6bnGpLSv+eVsWswD3cB5Sgxb9+S0KHrUrZR+5jhqnz9h32IpNJix375GxLfVWrHZ8CyXkHESjEUJxp2BA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728327276; c=relaxed/simple; bh=FJ2i0gCuiLN7Y5sHLWGH2qKOsPdPjWskYeuQ5ygjcoQ=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=oaMUkT+F7YtpIJDNhcN7wOgMfV/d5Xv31dGYoBUoXT3cuAEwdt6IMHD5ZpbMyMo068+ILtTKcTRwmhGuSbLyq2qd/jBs3Eu6wDGwRpzxHrjdEc601pmIvtE8RoLe8gLg1gozsgB3kHeepx9k6DFiB0qRJTcHq1gJ3uCjGAdFd+E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=afaics.de; spf=none smtp.mailfrom=afaics.de; arc=none smtp.client-ip=82.98.82.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=afaics.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=afaics.de Received: (qmail 11331 invoked from network); 7 Oct 2024 18:54:28 -0000 Received: from unknown (HELO mailhost.afaics.de) (postmaster@xqrsonfo.mail.selfhost.de@79.192.205.88) by mailout.selfhost.de with ESMTPA; 7 Oct 2024 18:54:28 -0000 Received: from [IPV6:2003:e3:1f39:3702:68fd:ffff:fe6f:e76] (p200300e31f39370268fdfffffe6f0e76.dip0.t-ipconnect.de [2003:e3:1f39:3702:68fd:ffff:fe6f:e76]) by marvin.afaics.de (OpenSMTPD) with ESMTP id f24367b8; Mon, 7 Oct 2024 20:54:28 +0200 (CEST) Message-ID: Date: Mon, 7 Oct 2024 20:54:28 +0200 Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Betterbird (Linux) Subject: Re: [syzbot] [nfs?] INFO: task hung in nfsd_umount From: Harald Dunkel To: NeilBrown Cc: syzbot , Jeff Layton , Dai.Ngo@oracle.com, chuck.lever@oracle.com, kolga@netapp.com, linux-nfs@vger.kernel.org, syzkaller-bugs@googlegroups.com, tom@talpey.com References: <> <172808507143.1692160.17519936392458356798@noble.neil.brown.name> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024-10-07 12:51:08, Harald Dunkel wrote: > Hi Neil, > > ACK. Debian provided a new kernel version 6.1.112 for Bookworm, anyway. > May I send you a task dump of the running system (before nfsd getting > stuck) after the reboot, just for verification? > Rebooted. The changelog for the new kernel mentions some nfsd fixes: - nfsd: Simplify code around svc_exit_thread() call in nfsd() - nfsd: separate nfsd_last_thread() from nfsd_put() - NFSD: simplify error paths in nfsd_svc() - nfsd: call nfsd_last_thread() before final nfsd_put() - nfsd: drop the nfsd_put helper - nfsd: don't call locks_release_private() twice concurrently - nfsd: Fix a regression in nfsd_setattr() Do you think these fixes could be relevant here? Regards Harri