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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 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-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > 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