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 0088B2C21C0; Mon, 8 Dec 2025 09:22:03 +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=1765185728; cv=none; b=A2X8UwnBnUwqbCKe8kpE2fYhPsTckJlEiNqRfMOVwT+w82U+N8fw2RJiTTuPm35miNzz2YlYT+B6woSgQcwrejPgvySJ52+C3Nr++x0X3MSNIxcQ1JRA3OoPqWGoHugMWa2ZghrtltGVXpDkXyyIWvYYv9BP/20qmHaS7TfiMJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765185728; c=relaxed/simple; bh=1y+h/RRhbiOiejemkWoAfy9ANDy/n/eMEI/mQUh9wpo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=h4+Zc4SoWLykE6M2w4+Heav2STnMND74FeEdYeGfLUXqeObltstLkP5ZXy+aXKLaY0mHroiMB+EEDsmAHqG57fY9DzkAu6BJSSIXHpXxRb0UFAfdh0nZcw+JQrBF9C0Ao0FQ5cOn63EaQdW+2YcQhfiqj19HdX/Lq48CBoZvkas= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=qjN1SahT; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="qjN1SahT" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=0dcNIAJdjwBa1TCUp38vaur9HiS4AJA/cGpCIXdnO5E=; b=qjN1SahTYyloXwm8SJrCrf184I w9otFRfJIiodnl9/tkfHtO4amgYDh3/l7ydG9N8jUIaIEFReEkPhEbGPBfzJLPA1P3VjD/0InX4Hp ZukfS//KM0ELhf/LrFMpObb6pJjVA3uE9LeBBfzwgb3as7+Tf5XIm+SLGDGJdPNlYBoGwNAUh2Vl0 yvWlMG7GDDSC/pSw3Ncwubutwjued2F6uMyWlmhsRFsm3ar3Guo1WoZZ4xEXtzCpO9U5YE+u8dRtJ H364kKN9S6hwEv7NLtxWfLATsWg3e8U3nKECruHTRbtkxYWRzFlz11xTbvp7HTGrZx3QxcduZbuhn j4tYR28A==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vSXRO-00000009aFr-4Bvx; Mon, 08 Dec 2025 09:21:59 +0000 Date: Mon, 8 Dec 2025 09:21:58 +0000 From: Matthew Wilcox To: Peter Xu Cc: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jason Gunthorpe , Nico Pache , Zi Yan , Alex Mastro , David Hildenbrand , Alex Williamson , Zhi Wang , David Laight , Yi Liu , Ankit Agrawal , Kevin Tian , Andrew Morton , David Hildenbrand , Jonathan Corbet , linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Alexander Viro , Christian Brauner , Jan Kara , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Subject: Re: [PATCH v2 2/4] mm: Add file_operations.get_mapping_order() Message-ID: References: <20251204151003.171039-1-peterx@redhat.com> <20251204151003.171039-3-peterx@redhat.com> Precedence: bulk X-Mailing-List: linux-doc@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: On Thu, Dec 04, 2025 at 10:19:44AM -0500, Peter Xu wrote: > > Add one new file operation, get_mapping_order(). It can be used by file > > backends to report mapping order hints. This seems like a terrible idea. I'll look at it after Plumbers.