From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B827613B79F; Mon, 16 Sep 2024 12:16:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726488999; cv=none; b=IzzHfhK7jSHyXFA7NpDwWy3gsye9OiqgKraIHC0MDnF7XBsYUdxQrckw1ThC4cNpQiqu2+e5Dqc9Wv1gpq8cOJjKfpNX2Ott1pi6LJN6CNIg9dg3Iu0eA7ypJDmsMfjUhfBmO1NhBNbgHOwOr5wrqa3jtkNXlv7oMahhq9regxE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726488999; c=relaxed/simple; bh=O8sjaISbl65n+BzqV+pJwtzwzFEpUSGLHm3v6urMSRs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hGjCqEkxThttKsl1ijQK5kUq26jMIWVoc+G5UIwJ+QoY9dKG2Ve1UU6uTp0cvtfobs3LB7vHvpEq871LUueuxO+vKW+2YYFI3a/48q1FqhePGTB3szY+kvZyJHp7v0Mn5nlPDYnpF7ZS0GOCXOcavEDrlkcWo/m4e2xuRWHQxd0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=sgmvMot3; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="sgmvMot3" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=5+42I91UHYKbpgVx0xLKFPyOFyQqdWJW5R7685LO37w=; b=sgmvMot3ZHHizrleAhYxMOo3G6 JlAD+NDucC/p5agSkNDRl2mQXxvpv5fBLBVQ8EGVJLX6DLez6TuyhUbUDGn8A00GvBk2wDG3D3wdC mvzQHO9okA7q74Uc49t+p5E7fuyA/0pSlgPngtoNq8mkPrUy4vsdDWLBbFsnMDdCcV6Rw+eUt4Lvi fraBqrrLdHsiXgJAp8va1X9SVk3FlKZYDzuh5AL5791nHt/obNV4Yit6AuVi2OcTv0D1tS/PINixh mtm/bRp4ZRrCLEMJaM5wakM3oxu0wIUjzRVZX2zqMyLTSv9OcSHDFDz9575ooyf8hS9tEwJf8/EwM qY5H9Y8w==; 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> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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> 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.