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 X-Spam-Level: X-Spam-Status: No, score=-4.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 553BCC433E0 for ; Wed, 3 Feb 2021 12:16:22 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 93BCF64DF4 for ; Wed, 3 Feb 2021 12:16:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93BCF64DF4 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GLfQeLbdM59zaXd/sCfuw87WUoZR+PDO3keVEn49jsQ=; b=c+jS6w8xarws4SqzShu4EBKUj mrUPs/vk9k+PmE8x+OyPJIr20/qZ8zU79dAjj7PiYC+gPWheTqswRc+NR0i0cdPzd1MTM1wpqYQ3I /jCdlzg+ydJsb1vyp42KhcJpd4u1vHvvECBBs1TmEPdrv8rHD9AW7VDv7Iz7vh2Pw5mk2ONVyckDi U303RclSzsL2BxA4snD4lRtQZEIkY9IFKvXhi1d646cU3e/bT4EeC6TkhooUqnADs7hHYi2d/WPJz bw7R1pGjhUBw29JyWKwo2zR/pFQzvvG4iXzrQzu8D58x9YAcU8h7z3TB2ht1os82SdR78S5vIsM/Q p8oahfgKw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7H4t-0000SZ-4u; Wed, 03 Feb 2021 12:16:11 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7H4n-0000PH-A2; Wed, 03 Feb 2021 12:16:06 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1612354564; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=CWryIVYU+uhWQij5Zedr+mthwADlpM4pzIqLbc2PJTE=; b=ZO1FDrig5tnUD0sD709rRk12j9b+f6/535vnUH3W+CDbRbO/2c6Kc8pifEUT1BMziNVfXa CPTfjc6g/FfslyAYggad3k3ARdbimmNlG06TOX0F6IyHHo/BNMtx/NehxH/OCa8d7HxX5C VpPnKpOaRmZ4e14jLHdyuC1KXNF7S80= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E0430B17A; Wed, 3 Feb 2021 12:16:03 +0000 (UTC) Date: Wed, 3 Feb 2021 13:15:58 +0100 From: Michal Hocko To: Mike Rapoport Subject: Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas Message-ID: References: <20210121122723.3446-1-rppt@kernel.org> <20210121122723.3446-7-rppt@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210121122723.3446-7-rppt@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210203_071605_545379_7E7C11B1 X-CRM114-Status: GOOD ( 14.20 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , David Hildenbrand , Peter Zijlstra , Catalin Marinas , Dave Hansen , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, "H. Peter Anvin" , Christopher Lameter , Shuah Khan , Thomas Gleixner , Elena Reshetova , linux-arch@vger.kernel.org, Tycho Andersen , linux-nvdimm@lists.01.org, Will Deacon , x86@kernel.org, Matthew Wilcox , Mike Rapoport , Ingo Molnar , Michael Kerrisk , Palmer Dabbelt , Arnd Bergmann , James Bottomley , Hagen Paul Pfeifer , Borislav Petkov , Alexander Viro , Andy Lutomirski , Paul Walmsley , "Kirill A. Shutemov" , Dan Williams , linux-arm-kernel@lists.infradead.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Palmer Dabbelt , linux-fsdevel@vger.kernel.org, Shakeel Butt , Andrew Morton , Rick Edgecombe , Roman Gushchin Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu 21-01-21 14:27:18, Mike Rapoport wrote: > +static struct file *secretmem_file_create(unsigned long flags) > +{ > + struct file *file = ERR_PTR(-ENOMEM); > + struct secretmem_ctx *ctx; > + struct inode *inode; > + > + inode = alloc_anon_inode(secretmem_mnt->mnt_sb); > + if (IS_ERR(inode)) > + return ERR_CAST(inode); > + > + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + goto err_free_inode; > + > + file = alloc_file_pseudo(inode, secretmem_mnt, "secretmem", > + O_RDWR, &secretmem_fops); > + if (IS_ERR(file)) > + goto err_free_ctx; > + > + mapping_set_unevictable(inode->i_mapping); Btw. you need also mapping_set_gfp_mask(mapping, GFP_HIGHUSER) because the default is GFP_HIGHUSER_MOVABLE and you do not support migration so no pages from movable zones should be allowed. -- Michal Hocko SUSE Labs _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv