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Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1sqAeW-00000001vRN-3pyw; Mon, 16 Sep 2024 12:16:25 +0000 Date: Mon, 16 Sep 2024 13:16:24 +0100 From: Matthew Wilcox To: Christian Theune Cc: Dave Chinner , Linus Torvalds , Jens Axboe , linux-mm@kvack.org, "linux-xfs@vger.kernel.org" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Dao , clm@meta.com, regressions@lists.linux.dev, regressions@leemhuis.info Subject: Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards) Message-ID: References: <0fc8c3e7-e5d2-40db-8661-8c7199f84e43@kernel.dk> <686D222E-3CA3-49BE-A9E5-E5E2F5AFD5DA@flyingcircus.io> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <686D222E-3CA3-49BE-A9E5-E5E2F5AFD5DA@flyingcircus.io> X-Rspam-User: X-Stat-Signature: 4gigr1e3pjgx8hi5tzweec1ydj3xmy19 X-Rspamd-Queue-Id: 1F0701C0007 X-Rspamd-Server: rspam02 X-HE-Tag: 1726488991-720210 X-HE-Meta: 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 75r3dqpd YQ67+xD978wis6EvII+aYXmg51ZuMR8gbBEjWiroFPnQDcP+YloxPSFZBMgioP3G2lQj+Aemgkvvu6iYBAhkBf8WYk1fuwQCHs6WcI//GiSseRVVo5QpympXC+R6bTbL3FH7qW/SVSe0OkNhFvft5AuLbpjVCco/GPXieWK/Ymfh0cWzVfReeKe6D75UonRvGkzWWb1R3fENCl6IyTCgaw2kApQ7cQYKe4SxHU0cOjneHZd9m48QCIz/4cSdZDdMWGvn1If2zY6CaIILmw9BDRepFroqTVbq0J+3pK9EsuS+i8H0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000009, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Sep 16, 2024 at 09:14:45AM +0200, Christian Theune wrote: > Also, I’m still puzzled about the one variation that seems to involve page faults and not XFS. That’s something I haven’t seen a response to yet whether this IS in fact interesting or not. It's not; once the page cache is corrupted, it doesn't matter whether we go through the filesystem to get the page or not.