From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f170.google.com (mail-dy1-f170.google.com [74.125.82.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3D9225B0B7 for ; Sat, 23 May 2026 18:32:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779561147; cv=none; b=r1168lFTk/lluN7iHNE3Fgt1iFCy7AmpEm9hAid/gFGu+mXqnvuIqoYXHnGR/uacy7hixIu9mZxr7fkOB26c6Pz0QmQCUCSIbkuq/1bLl+yulLi7kgCp8EhLNKaCA+rkfk0cP4SMz0YVEKvj7FLCPCNBurzCwX7xgKNN1Lx1LXU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779561147; c=relaxed/simple; bh=hPajcYyIhGoYyempZ5jrgZZlm51vmw6YCtWjAb9hR8Y=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=FVeEozFQ2Ocjbnoj/4ZcB7jNuVcK0S8K/tA2FBOs8BMJsBWJiahLs7XxKVTYbggcuCh+rQXB6ZVxtjaeqxzXrDVfzBzgOxRguUS0PdlxegDutieHVwm/3YWcX/OocMcr9gwhs1scZvLQ7t1DA6Xv3LABK+THANVZORwZxiFb7c0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=YwvzeL+w; arc=none smtp.client-ip=74.125.82.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YwvzeL+w" Received: by mail-dy1-f170.google.com with SMTP id 5a478bee46e88-2f30a4601bbso8537360eec.1 for ; Sat, 23 May 2026 11:32:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779561144; x=1780165944; darn=vger.kernel.org; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=Id5dyBpQ6V3HQihPc3Wj/9kDk66whwQYXcAhNcn5FWw=; b=YwvzeL+wG+50H6NvtNcSEbRH0yhqyRVvm5FDxXV3Uuc9mGCQvRZ7PMtiFtoTvdnzt8 L6yepNiwrYGZzxHsbp7vc+f2pNINUnJxQBva3wH4LemL6SViLRdcDMQdPUWQbKvmjWXB 5xpEcPwXf77gWoC9osDPKhHY6ByEJDTdE+n+qZYTYHaKw4yJnefOnpMk896TDUN29pwh Q4eZC56nHpKBm277rx3rWIva8sKT6nYto2snhjJzezCQIIY+pnlCfKXY4FR34sNdnUsD ld0/RSqWBt0UueRwERwfhnbbDjBs7QAKZykxju5NFLHVZJZrSluMJd02R8iCQr4KQkdI 9iiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779561144; x=1780165944; h=mime-version:user-agent:message-id:date:references:in-reply-to :subject:cc:to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=Id5dyBpQ6V3HQihPc3Wj/9kDk66whwQYXcAhNcn5FWw=; b=UJIDs4g/7hhjFV1qeryy5RTHbTIRsLT2Jtn/jf3wzYqtMT3TvrSkiDc0yZjIMkZ3Rm UAzWYDBN+zmsdU0T3TGLZr23oQyVfvUPXyAijbgS6QBv+AowumNmX1y7k7J+4qaX9oZa FOB6TPPajDT3bvsSWTbStdtXx/uf4XTfjh3lbRX0epS8dnXmL/BYX8xxXQUs6cWaqf+b WvQfInWKAxhkEiA6ewJ+k6NDa0i5uPGwz7v/3U4AMrbDhL6F6x35pXMpe8ZcCnp0t0lv hKCbt5EbVJcQL/dqU4fIrTiWEAYpdkUspjko3FS/j9vfxF5lmcwNBYVVjqukK60vfVWC YXtA== X-Forwarded-Encrypted: i=1; AFNElJ/+vr8rqt0hDKQdkSOTjopXJ7YutUv8hZ/AYk2bEn6WEpPbT3sgPyVrqZno3MgNbb2LV6arfNLCbvh1sQ==@vger.kernel.org X-Gm-Message-State: AOJu0Yxn5R2yNRYqTTSmXafvvr59kIY1/t3ibYUT9UfiiQPWPE3QaH1+ FfUoOrI/gtL7Sl3hEAK0/FD3Fe68CXJrykl7rET5Q89Xo5F3+COHb2UDQlWu9g== X-Gm-Gg: Acq92OGjQ2uvYqtufcOuPX5TkHWuWnH5AZUm5TWkkL0gZSyfcnx40xS+ffuyp+CtbTK mQ+px0HBDXorfDOoBv/MGVNtLEak9R22uyg9zOadrmmypFFnxqoWyg6Bcr8tBCXw4ZvS1ItbBvl EGaW1lvSvwTId7x9Mve6pnwvgmwao1inXWEH8EgBJlhaS8qRbeBb1bcB4UC56eL8t/kioDWCCns cfshkdUg6IKhCH6tEz2dC8WdIhdtv8Su9TS2bV1BGm8jwyFjnD82SAVaHEua272hSWLh3s9SREQ mo25khqEJ7fS8yjPqUvd9OPo/ks9O3QEYJ9d5UjQE6wMTq2ffWgPUx15K9qrKxqP4eLVWdfg7sT 6uQzLxoygPS19H0nCLFiObl0tKM2au4WqE7ib6AXdCSBltNLW/rf03lxgxwR8evWk1a9UYykbUa s6ZVhxbmZP2ltSpCnnDrBMkFo= X-Received: by 2002:a05:7300:6da7:b0:2f2:6dde:df50 with SMTP id 5a478bee46e88-30449054359mr4460387eec.17.1779561143969; Sat, 23 May 2026 11:32:23 -0700 (PDT) Received: from fedora ([2601:646:8081:3770:10ff:fc71:c346:9948]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3045225b7b6sm5660277eec.25.2026.05.23.11.32.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 May 2026 11:32:23 -0700 (PDT) From: Collin Funk To: Christoph Hellwig Cc: bug-gnulib@gnu.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jan Kara , Christian Brauner Subject: Re: test-fdutimensat failures after 7.0.6-200.fc44.x86_64 kernel update In-Reply-To: <20260518055617.GB10368@lst.de> References: <8733zsj5qj.fsf@gmail.com> <20260518055617.GB10368@lst.de> Date: Sat, 23 May 2026 11:32:22 -0700 Message-ID: <87ik8enfih.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Hi Christoph, Christoph Hellwig writes: > On Fri, May 15, 2026 at 10:14:28PM -0700, Collin Funk wrote: >> Adding some print statements in place of the comment: >> >> fprintf (stderr, "%jd\n", (intmax_t) st3.st_atime); >> fprintf (stderr, "%jd\n", (intmax_t) Y2K); >> fprintf (stderr, "----------------\n"); > > Can you share a complete stand-alone C source file for this > reproducer? It would be quite difficult. The test uses a nap function that sleeps until the system can notice a timestamp difference. It attempts to use the smallest interval possible, which requires a bit of work [1]. Apologies for the late reply, I haven't been able to reproduce this since my original report. I'll let you know if it occurs again and hopefully I can create a simple reproducer. Thanks, Collin [1] https://github.com/coreutils/gnulib/blob/5ab7a04761dac69403f677de4ee44c1940777b46/tests/nap.h