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Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <454834.1650373340@warthog.procyon.org.uk> <508603.1650385022@warthog.procyon.org.uk> To: Max Kellermann Cc: dhowells@redhat.com, linux-cachefs@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: fscache corruption in Linux 5.17? MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <510135.1650386821.1@warthog.procyon.org.uk> Date: Tue, 19 Apr 2022 17:47:01 +0100 Message-ID: <510136.1650386821@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-Spam-Status: No, score=-3.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Max Kellermann wrote: > I don't think any write is misaligned. This was triggered by a > WordPress update, so I think the WordPress updater truncated and > rewrote all files. Random guess: some pages got transferred to the > NFS server, but the local copy in fscache did not get updated. Do the NFS servers change the files that are being served - or is it just WordPress pushing the changes to the NFS servers for the web servers to then export? David