From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4657B16E860; Wed, 18 Sep 2024 09:51:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726653076; cv=none; b=jyP+xH7H4Ux3b/E2Y+cbFFl9d9m8vEKCgzK7NNWEkTMpTiX59nonS/f+62zBfRz+geKrOpGWBOtewslgup2ppd7HD3sUdeQ+3yZguLLZJ7+tJvc/9oshtGEWZ+YV2MIWApJoNN8glwC8piyFjnPblUY9wfNeiCeOZIKbWmNzAu8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726653076; c=relaxed/simple; bh=L28pSEH2Qs5aYQHvisV8vDOvgSb7Lbzbx9KlpIjyxG0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=tRQJd9PJMKhAGImuHOVUytCRCp7DcM8mCmeuiun2rnrX90ZNgy/qWPfujy4yvJXZvXP2nN+YnLv11a+IYCMQyp7NOJElrQCgzlr7s/eYDScPG/mAXAjRkNIt74gvEUDxU3m2RKamXZf1dGVv+wj08wjf0Q86ay0KVLaQpLM2Sbw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ODkjPOlU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ODkjPOlU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E97ABC4CECF; Wed, 18 Sep 2024 09:51:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726653075; bh=L28pSEH2Qs5aYQHvisV8vDOvgSb7Lbzbx9KlpIjyxG0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ODkjPOlUTZmXZB+TH1d/ul+Smkw5Y03ibLg63CmNrHfAikVkAyIZoHeYaZv0nfz41 xKWykYRjXfzAUlx0JJC96cScMJRlJWTPVSHPQ5F65+5X0UKu2mVO7CIyz0MiMx2ZdZ 0NzCHkaOmNCQUqSq0Y1qOWBdg30tZtJljrqzUfumiuwojU0uG6VwKovOaq/gjyZyXz UcisB7Mj5Q/iuAAwFxTxusZaGDD45SRJ6hSiBUoZfzPixhGLOd45PIjAT5TxQiNzp1 CIfHveBHormIvxcZwKNah6l+KQa0tLn9fDDZJ/ioOYT3NYL1k8HxZBJr/SBBQTb97Y lqB8FQ7fXB1WQ== Date: Wed, 18 Sep 2024 11:51:09 +0200 From: Christian Brauner To: Matthew Wilcox Cc: Linus Torvalds , Pankaj Raghav , Luis Chamberlain , Jens Axboe , Christian Theune , linux-mm@kvack.org, "linux-xfs@vger.kernel.org" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Dao , Dave Chinner , 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: <20240918-geordert-bedecken-93c97e15e82e@brauner> References: <0fc8c3e7-e5d2-40db-8661-8c7199f84e43@kernel.dk> <20240913-ortsausgang-baustart-1dae9a18254d@brauner> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Mon, Sep 16, 2024 at 02:29:49PM GMT, Matthew Wilcox wrote: > On Fri, Sep 13, 2024 at 02:11:22PM +0200, Christian Brauner wrote: > > So this issue it new to me as well. One of the items this cycle is the > > work to enable support for block sizes that are larger than page sizes > > via the large block size (LBS) series that's been sitting in -next for a > > long time. That work specifically targets xfs and builds on top of the > > large folio support. > > > > If the support for large folios is going to be reverted in xfs then I > > see no point to merge the LBS work now. So I'm holding off on sending > > that pull request until a decision is made (for xfs). As far as I > > understand, supporting larger block sizes will not be meaningful without > > large folio support. > > This is unwarranted; please send this pull request. We're not going to > rip out all of the infrastructure although we might end up disabling it > by default. There's a bunch of other work queued up behind that, and not > having it in Linus' tree is just going to make everything more painful. Now that there's a reproducer and hopefully soon a fix I think we can try and merge this next week.