From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 063F23AE715; Thu, 30 Jul 2026 12:52:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785415956; cv=none; b=XO26x+RpTpQwDcw4GHZNUJ+Ob+dvN8VS6KMxoTQMljSenl38kYmAx/gwvvKQbNI/Gy4T7A0mOHc8FwQdYD2f9YXP882m9XUPWqi/O2fTkivvmEEk5ewX1v8wvBqtS0TmpRuWVSNy0eyGWNK2JjC+cDHPOhkNLRrRuCEdt6CThvo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785415956; c=relaxed/simple; bh=07lNuD5ptxWBI+AKSt0qjJALzC9Vhu0wMgNXOgZOB7Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=T4y9CriipKg1xbhhQkgL6OFvQTxiXSHtqaP9Se+qzABSmTLy79elOwTR2bXLAvRw/79tavLijTDQMclB6YYBLAA79dYOHTz6uJ9pThNiisfKt6SW7x9XHlN4aa4q+30eHadTVAHCjy+Dx1aVqjp2qqgM+qLIIRcXOWRi10NL23c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f5K6VOjz; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="f5K6VOjz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 62CC81F00A3D; Thu, 30 Jul 2026 12:52:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785415950; bh=wNLqfaailhWRC00dmZqTCn7FJigC0qHjk4FhgDFhBVo=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=f5K6VOjziwdzVIf0zfQ/D3pK3Tn8Qp/A0rG3aDbF/zWVcL3VQtNOOz3qvgfjbBSNn PH2VLeW5rlDN5FAZosashIdwpIZuzT91qT4rWGczTrBobCRHKAmwTi422HtJPpjBKN O1sEXxn3SLQx3ZWGMt+u7UnKoo9kzMZydj4H5Y8MeqQHt8YIHK6cNAVlDkTeKpRIqa uzG66knLe9JRxS469iLnP6dFzZAmPmmvbbkipmlS16DpKpMAA4sU1yDrM0l5sKe94e hDv5uB1r+LhCsqktb5qhMBGqDe9opSRSb40bNLubJlJ5uXMPX6TUhTXeNm2YhENRtQ HkKC+pUlRdgzA== Date: Thu, 30 Jul 2026 06:52:28 -0600 From: Keith Busch To: Christoph Hellwig Cc: Jens Axboe , Keith Busch , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, dm-devel@lists.linux.dev, brauner@kernel.org, djwong@kernel.org, viro@zeniv.linux.org.uk, regressions@lists.linux.dev, torvalds@linux-foundation.org Subject: Re: [PATCH RESEND 0/5] block: validate direct I/O memory alignment Message-ID: References: <20260720201057.1862857-1-kbusch@meta.com> <20260730112626.GA24827@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260730112626.GA24827@lst.de> On Thu, Jul 30, 2026 at 01:26:26PM +0200, Christoph Hellwig wrote: > On Wed, Jul 29, 2026 at 02:03:07PM -0600, Keith Busch wrote: > > > > Hi Jens, have you had a chance to look at this one yet? This addresses > > > > previous issues with certain device mappers under direct io. > > > > > > I they look fine, but at this point we should toss them into 7.3. Yes > > > I know there are regressions around this, but from 6.1x days. And the > > > series doesn't apply to the current block-7.2 anyway. > > > > This series is kind of old at this point, but yes, it's not fixing a new > > regression either. I'm okay if this goes to the next window, and I will > > handle the stable follow-up. > > Honestly, I think that'a a reall bad idea. This is a regression in 6.18, > and while it took a while for people to hit this with their a little > more complicated lvm/md setups, it has stopped real systems from being > used. We need to fix this ASAP. This should have gone in several weeks ago, IMO. You can most readily hit a problem running qemu against one of those lvm setups. We're just so late in this release cycle that I'm not pushing hard for 7.2, but I would support that choice too.