From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 30BD6C43458 for ; Tue, 7 Jul 2026 13:37:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1490A6B00A1; Tue, 7 Jul 2026 09:37:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 11FEB6B00A2; Tue, 7 Jul 2026 09:37:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 036B96B00A3; Tue, 7 Jul 2026 09:37:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id D327E6B00A1 for ; Tue, 7 Jul 2026 09:37:03 -0400 (EDT) Received: from smtpin28.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 33EA61C2E53 for ; Tue, 7 Jul 2026 13:37:03 +0000 (UTC) X-FDA: 84962081526.28.4283AFA Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf14.hostedemail.com (Postfix) with ESMTP id 8A77310000D for ; Tue, 7 Jul 2026 13:37:01 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=kUwTJQX7; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783431421; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=vTs7v8zsu7whrsyWYprIzwZsShGkshSeH1mdnWeQhDk=; b=ZnqwAcLNdwPJWBUjWTcey+lHoUVApOMIGNoVF/3lABds4DLEHOKpjJJnL0n8Ai3GUEWnb1 CHnl/FMNwl63CULmh5ImSV2ibi5ms2XpGrc+GyBLVA6OroNNwVJFc1d7ziLrqyFestCPAo qNNRMSYhR1nQCNhtJuhzZrMykDZP8PQ= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=kUwTJQX7; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783431421; b=bsn1pBGuTgx9It3d1XG3zvC1cTkobeoPgGb5lClGbJVG8gaR5qztJA3tdIFuL00/T3uuAY 4ji0sFqg64Xt+Vzft3YIahK/76IW2r7eg9UmwvfIklTnOBS5ITIUWqiRZ7DYGEnF0yNXWK +l4jEQevbeTLYi4TqT4paYjKd+TKI5w= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id AC08642EA7; Tue, 7 Jul 2026 13:37:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B9E271F00A3A; Tue, 7 Jul 2026 13:36:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783431420; bh=vTs7v8zsu7whrsyWYprIzwZsShGkshSeH1mdnWeQhDk=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=kUwTJQX71bILcSB7SmskFWmkhK3TGF8YHFkyzQY17WlEUAM8I+JqGhzvo55X7PZDi oNje6D+myo2INszEVM2+lfsi+C0YTOUvQd8LQ6wAhpcKtd1hSyiihaQKnBkeNV4GNZ 5/3ulew7PLDZljlcalvW+jw7W3SqxgElQzYMRTnDAV7mG6O1GMwabMWgRGCkympsPW 1RpMFJA/eH96zKbocqhlAzgaIjPRn+rPf4mrjkia4fALw+u63xKvDyGhiNKwawd808 fZfwtvsYxWNpieAutJUVIs8936x82mFXpOxy8SGgRrCjLSRSD8AtbD3lO570OfQ5nP hhaRyoXYh5eFQ== Date: Tue, 7 Jul 2026 16:36:41 +0300 From: Mike Rapoport To: Robin Murphy Cc: Will Deacon , Thierry Reding , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Hunter , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sowjanya Komatineni , Luca Ceresoli , Mikko Perttunen , Yury Norov , Rasmus Villemoes , Russell King , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Marek Szyprowski , Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , Christian =?iso-8859-1?Q?K=F6nig?= , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Catalin Marinas , Thierry Reding , devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev, linaro-mm-sig@lists.linaro.org, linux-trace-kernel@vger.kernel.org, Thierry Reding , Chun Ng Subject: Re: [PATCH v3 04/11] arm64/mm: Add set_memory_device() and set_memory_normal() Message-ID: References: <20260701-tegra-vpr-v3-0-d80f7b871bb4@nvidia.com> <20260701-tegra-vpr-v3-4-d80f7b871bb4@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 8A77310000D X-Stat-Signature: u5aszaqma861gyp6qyzt6qej44634fqy X-HE-Tag: 1783431421-125902 X-HE-Meta: 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 5ZPH3KwQ q7lCNvTNa6xQg0kXR1++MfxSQF5NsyapCdcFtngyQLS7CoXCMKGwj9W8ypJsjdUDfzWSrUSMH4cAtRx1YtgqVW1bU3Uq35mhN1rIlnz0tmSowsmdG22kOoU0lF+ZFCHZFpQUfZjLEsMaY3EG2yW7KJbLXQaKzKehAL1eBfJqlyd46iHcAkNM60lp/748eO31i355+laa3CyFClFGlQ6IgPToIo4sEPj2m/Lf3Fu9hdAt/2BHnJ8pTovu9UtVlDu8uoLEAXtM2iQENUyoH80U/cuyOtyLS0nS1hoAyi6/PEsrE2td5WqDFeBVgMwfuf+vWJWfyiZQXmRek194UY/e7dXZ/0Z8OTRUs0cn7HYjOBjcLo/ABB8CwvKDSOE+g8FbYBLIaWYOzV6cSV2nC2tp3xI+UD/o2b91d01CN Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jul 07, 2026 at 02:17:29PM +0100, Robin Murphy wrote: > > Given the precedent of memblock_mark_nomap(), as long as the reusable > reserved-memory regions also get split into distinct memblocks, then it > seems like in principle we ought to be able to give them a new > MEMBLOCK_PTEMAP (or whatever) flag which could then be picked up in > map_mem() without needing to override force_pte_mapping() globally? Please don't. _nomap() caused enough pain. > Cheers, > Robin. -- Sincerely yours, Mike.