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]) by smtp.lore.kernel.org (Postfix) with ESMTP id E818EC3DA5D for ; Fri, 19 Jul 2024 12:42:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6172A6B0082; Fri, 19 Jul 2024 08:42:50 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5C7516B0083; Fri, 19 Jul 2024 08:42:50 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 48F536B0088; Fri, 19 Jul 2024 08:42:50 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 2A1C06B0082 for ; Fri, 19 Jul 2024 08:42:50 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id BF4FD1A0621 for ; Fri, 19 Jul 2024 12:42:49 +0000 (UTC) X-FDA: 82356466458.30.6A1015D Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf24.hostedemail.com (Postfix) with ESMTP id 9A168180034 for ; Fri, 19 Jul 2024 12:42:44 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="oy/GDuVV"; dmarc=none; spf=none (imf24.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1721392934; a=rsa-sha256; cv=none; b=nhkHyuUr2Dg/qMd+nah0MQ4V5Y5oj7vk/HchQaHmlbFM5767T/9Dtw9z1//YhwMNmnp84J 367JVHUDCoU89ouo5a47/ctHZ0bzuWcO8dSrxyDNeGr7+xjfeTD9d5rzVqcg7yVNqHprJo 0kIvDWR8dZBMlVRXm9JnWnWeBxMRxwE= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="oy/GDuVV"; dmarc=none; spf=none (imf24.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1721392934; 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=W3a+XTwexnz8rPMwMCQeFI74MJDMGFFcGv41YRD0k+4=; b=m0Bs10BfT4kQjoMuUyTJhYcSLvTgvVRWwpQKMo+CAWy97uQzq1BxfO9dYkDVz4IcPYnhCw C6+/BsgOFP3VQuOIiBIHSxelHJRIU10XH0+iaWKchquh7bZtzr/jAF7YkQfdXq3gvKdLiK 7O3YE/smR355PPsjW0o4D6hOi4Rn61o= 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=W3a+XTwexnz8rPMwMCQeFI74MJDMGFFcGv41YRD0k+4=; b=oy/GDuVV2x498dOs09fyfUMYTd ufGTBzQPDaTM1z5OxOe0dNvG20z+0PTekc4GG70tVSMnx/8F4HhQdjjz03zR0NAcfx+pB4ZfzNkzf HCOY7gboZztMflA8wGTSZYxIXPR6Ss84fuygT9xRo2Sh9/m2gM0xYHIfh3bFPF16wOWK3IASHYTQU bI17ywkR2Fcq394BfAKAiQaiK2NTvIZ1rTPHx+/hVyRIsVlWKGj+ImUAMz/0dM995sHC5UcU8Bc0y IrvTNtyi8NJisqN0//o+i9yXZUHlgdvPPe0LBUg/YaKUk2+rCoBkio3UKwKJseOo3XhmrDpNvKS2/ vL3zHZzQ==; Received: from willy by casper.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1sUmwb-0000000330F-0B6j; Fri, 19 Jul 2024 12:42:41 +0000 Date: Fri, 19 Jul 2024 13:42:40 +0100 From: Matthew Wilcox To: Mary Strodl Cc: Christian Gmeiner , Andrew Morton , Christoph Hellwig , Mary Strodl , linux-kernel@vger.kernel.org, urezki@gmail.com, linux-mm@kvack.org, lee@kernel.org, andi.shyti@kernel.org, linux-i2c@vger.kernel.org, s.hauer@pengutronix.de Subject: Re: [PATCH 1/3] mm: vmalloc: export __vmalloc_node_range Message-ID: References: <20240718143103.82e33c556b2d1b6145ae43e0@linux-foundation.org> <20240718143924.43e22f68cf639b064a83f118@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 9A168180034 X-Stat-Signature: c4dssyef4zy3c4sjs5wo1jgkametguqj X-Rspam-User: X-HE-Tag: 1721392964-166666 X-HE-Meta: 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 gep3srQ5 x71E5NioRBfTB//nve99/ORSv+/hf6yTMb3sg+d/blCOdc5jW6rn1HWF5oVWrg4uYXpz3xdZ1pR9q70IzjINT/2jg+KvBmhOiLPdAZ7TjCCqIA5El0zlk9S/JwcsjmgSWpt3YUdpmqPOwzFZI2ac3kzZnvub3x+6Q8VaZVYXWwdzxgA7k/di38RYM9561NuuQJtL47yWcv9wqQJLjzrsAxmoIizu8gssNhd1U1t1ofleh7Zy+YvTy2dQzDDA5t+uHhy4ktRDNQG5QrbYSXo+DGeYluY9+zxnKZNGq+5nNr3j+N2f1dsQzBHYyG8huItdAr0Mggjyx5wgoT7qxpSk3okq9pg5rIdGVEfLz X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Jul 19, 2024 at 07:58:40AM -0400, Mary Strodl wrote: > Maybe some of the stuff the driver does right now could be moved into > vmalloc? In other words, we could provide a different function that > allocates an executable page, copies memory into it, then marks it > read-only. Would that do better to alleviate concerns? No. We are not running arbitrary x86 code. That is a security nightmare.