From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793908713; b=SE76yDFeFmcU3Z00DkNgowPzbP2kMT2yzq7ZgR1d+7q4+DhffvmK8+a+OuQk0yZX2yZN HHSidSmCaqCxOWdYXyLD6/u7ACthnU0dFRKGHq5DLNlrzgX8b1XAVAZE5yN/7K13HgZBJ /U38Y4zEPKri4YHcrOwh2vBMwbcV2LY3rKlRgqS402arSp3/SsWEO9c0HbdbfM+L01FO4 xno9EFHgusqDjhha60ElCXY5/zTOl3PCgR+8w0CezQlZR1BCRVtQzEXmxwLJ6A5JxTR6Z qqYKwKkjxLxtn7bO3Y69IAp+CTSnk/HP0+nZyDWk5kcubS3QoZaJO5kJpEZ9hUYu7OA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793908713; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=Fu3D7KbVL0XALbxpOg/99/chjuCyMPlpg1MAOjhFXPQ=; b=FF9OZbLJ+Fbxd7Sr1/d5bssCEKGY7JIcJJxslU6AcC607iX5qtROUi+QHx/c5gpHTApP JT2dlpMmFhpP0WW0jMCbxE61IfpNs7MrwDzZIYk1zzhF88iUutc/uPM1DRjOi54mwXC7w onpRPRarIBZoMHrcGe5rrDtRSwZ7geVxCb/ofCE8I2sq1OHdgYKCl+8kjz7Obo/v/mn7Y jDHI5utHqGyqZUNB1B77m7He3HYyuFMlHTvw4yCU1Nw813g04uIdLxVKQNsIaCoHtu9T4 ASlcSVp/7Sm+LyX7Ztz8qRc26Zm8f9Uxs+NaMBC7aWoEJUCNU/d2J745zv/OB6ueuCQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OumfSaDw; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 32F46606A33E; Thu, 5 Nov 2026 19:58:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=OumfSaDw Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CA431F008A1; Thu, 5 Nov 2026 19:58:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793908713; bh=Fu3D7KbVL0XALbxpOg/99/chjuCyMPlpg1MAOjhFXPQ=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=OumfSaDwTNZBpGJOWzIaiT6pjsiHCqCuEdUaz66yitHN1nNu5txd4yS9N4qziqeuA jKo6oOvNVnrmW1Ld/SRNRJlyIoYW+xi575vQWaVzSfKh4Q6aHkYPJ0bu4ianMe/ryp FY85+WivxPFkJEXo69NxZ98f5CWKvFEwF7vR5O7X1Ds9ii4+w6KQI6rHKutuqKTC/5 PJGugGwCCkbyMgPLbKXpkZegV1ou950ZWOzXqy4ZhzEAo//gqm2NGT/LmV6GGVGIFw GkRGt05JBCoUhdhRlgBNsfNUA/ok0dXb29KIdwCOoyz5PlaaZL7x/S1TIIAEL/3HQI uTDOX6NycFX8g== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RESEND v2 30/30] selftests/proc: check that unloading configs doesn't wait for a reader Reply-To: sashiko-reviews@lists.linux.dev To: "Christian Brauner" Cc: "Linus Torvalds" , "Jann Horn" , "Josef Bacik" , "Chris Mason" , "Jeff Layton" , NeilBrown , "Eric Dumazet" , "Thomas Gleixner" , "Al Viro" , "Jonathan Corbet" , "Christoph Hellwig" , "Greg Kroah-Hartman" , "Joel Granados" , "Kees Cook" , "Jan Kara" , "Jan Kara" , linux-s390@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, linux-m68k@lists.linux-m68k.org, linux-serial@vger.kernel.org, "Takashi Iwai" , linux-ext4@vger.kernel.org, "Chuck Lever" , tytso@mit.edu, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" , "Christian Borntraeger" In-Reply-To: <20261104-work-procfs-fs-v2-30-319e0f9a8aae@kernel.org> References: <20261104-work-procfs-fs-v2-0-319e0f9a8aae@kernel.org> <20261104-work-procfs-fs-v2-30-319e0f9a8aae@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 05 Nov 2026 19:58:29 +0000 X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Read /proc/config.gz into a buffer whose first page is backed by > userfaultfd and unload configs.ko while procfs copies what was read to > userspace: >=20 > - removing the entry doesn't wait for the reader >=20 > - the reader still gets the page that was read before the removal, and > nothing more >=20 > - and the next read fails with -EIO >=20 > The test loads configs.ko if it isn't there, skips if configs is built > in or can't be unloaded, and loads it again afterwards. It needs > CONFIG_IKCONFIG=3Dm. kselftest-merge keeps the =3Dy that other fragments > ask for, so it skips there. >=20 > Signed-off-by: Christian Brauner (Amutable) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261104-work-procf= s-fs-v2-0-319e0f9a8aae@kernel.org?part=3D30