From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 09B131C54AA; Tue, 4 Mar 2025 13:50:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741096249; cv=none; b=sMLsVpPsoO8d6J24iQwiNZOio1P3JXFmfOmgR+1SxllqUg+S0Bajd/xg+mPdjMYcGZPNspSDb4ezDf1TOpRjUAY9aC71U/KDCzbBZhramlC0D1BJffKdHwAcQ3ulY4bXjK7WDDZaEPTX+lfL3334BHMFrxq6MFnXYutv3UyCkwA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741096249; c=relaxed/simple; bh=VyUykeqet9JSwQ2KV4Nw7ZT9QByZkDNd9HSOsHXr3g0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WmpzkXpiZPMRRZORFLWt78LCEKOUT0Yk1JfS9aPZnMzTXFnSj7KO6+rr2lxMbc9mbjZ8lZgxb1UDlVkh1hX6qbP4Z5C8+IVWEV9Oqkco6iibd9L5I6+GuJ41kLZfq30gHkI0O8Q0rIlbjjehAo6RvWTaeotVyfUr1E9ohTrXhEc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=zDJPPi/N; arc=none smtp.client-ip=198.137.202.133 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=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="zDJPPi/N" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=QHF7za52Pu8bMm2/1OlRR3fhMMqh4Nd+PvYp0UdoXMk=; b=zDJPPi/N8Kr9pI+bcXAf2ZO4Io 5ocf+UZidcYhssKGr4q0v4vIO47+fltH0FFgBz0zlnZSKIornJ09NA4iJ1BUU+c1LZdtMXjQkdR2b OqIUvdo0vqUGc6cHgwSYEKM6ewB2wFHZfN3abktWHTR5ZF+/Zt8U5XU7JMbMbNDsnWSy99KMtzoJF f2f79QD/FmSdvNtNBbrQMW1iqAqCzi/86TvJ3gMYAcikeCABZnWCLL2yJn64ng/6ZNpfNnUdQpBek CEw7fNteP5Qrc/tu+++ZVDKC9L8ihDpXEPFmnm1NXZZWiUlk0rBcd9hWAwutta9i0xI5s5ErqKhDK wBTd4EuA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tpSfW-00000004qUo-1svf; Tue, 04 Mar 2025 13:50:46 +0000 Date: Tue, 4 Mar 2025 05:50:46 -0800 From: Christoph Hellwig To: Mikulas Patocka Cc: Dave Chinner , Christoph Hellwig , Jens Axboe , Jooyung Han , Alasdair Kergon , Mike Snitzer , Heinz Mauelshagen , zkabelac@redhat.com, dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH] the dm-loop target Message-ID: References: <7d6ae2c9-df8e-50d0-7ad6-b787cb3cfab4@redhat.com> <8adb8df2-0c75-592d-bc3e-5609bb8de8d8@redhat.com> <1fde6ab6-bfba-3dc4-d7fb-67074036deb0@redhat.com> 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=us-ascii Content-Disposition: inline In-Reply-To: <1fde6ab6-bfba-3dc4-d7fb-67074036deb0@redhat.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Tue, Mar 04, 2025 at 12:18:04PM +0100, Mikulas Patocka wrote: > I'm not trying to break existing loop. You are f***cking breaking file system semantics. Stop it now. > The Android people concluded that loop is too slow and rather than using > loop they want to map a file using a table with dm-linear targets over the > image of the host filesystem. So, they are already doing what dm-loop is > doing. I've never seen bug reports from " The Android people". But maybe they just need to stop pointlessly using loop devices?