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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 28CB2C4338F for ; Wed, 25 Aug 2021 14:08:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A7A836108D for ; Wed, 25 Aug 2021 14:08:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A7A836108D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id EF1BF6B006C; Wed, 25 Aug 2021 10:08:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EA1E98D0002; Wed, 25 Aug 2021 10:08:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DB8CF8D0001; Wed, 25 Aug 2021 10:08:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0100.hostedemail.com [216.40.44.100]) by kanga.kvack.org (Postfix) with ESMTP id C14786B006C for ; Wed, 25 Aug 2021 10:08:29 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 30740243A6 for ; Wed, 25 Aug 2021 14:08:29 +0000 (UTC) X-FDA: 78513783138.11.E8DCAFE Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf04.hostedemail.com (Postfix) with ESMTP id 848B45000307 for ; Wed, 25 Aug 2021 14:08:27 +0000 (UTC) Received: from zn.tnic (p200300ec2f0ea7006bb4dcd1613a8626.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:a700:6bb4:dcd1:613a:8626]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id B24E11EC032C; Wed, 25 Aug 2021 16:00:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1629900016; h=from:from: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; bh=GhDtxzj1b1Wtn66QMK0bVDeTSbHy2I2GjFJNQ4tOTcs=; b=JQObVsKHzQ5hVxJmdcfCZsiUJqP6TAGsSfHvyV5ovpRf1//1rYhVadL4J3Ko/0A7WDsfK7 y4YdG/2kZ/sK83Zf5Vqdnk+tj7ONnW6kzW+NfRw9Har380rpXiFNVu36+niS1bHXecPVX0 hXw4d1tEXpF6nii57mSh7iNh9CYPWTc= Date: Wed, 25 Aug 2021 16:00:48 +0200 From: Borislav Petkov To: Brijesh Singh Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: Re: [PATCH Part1 v5 17/38] x86/mm: Add support to validate memory when changing C-bit Message-ID: References: <20210820151933.22401-1-brijesh.singh@amd.com> <20210820151933.22401-18-brijesh.singh@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=alien8.de header.s=dkim header.b=JQObVsKH; spf=pass (imf04.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de X-Stat-Signature: tm31kn4osrsyonu6a1jmek8rwur7fr7s X-Rspamd-Queue-Id: 848B45000307 X-Rspamd-Server: rspam04 X-HE-Tag: 1629900507-923439 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: On Wed, Aug 25, 2021 at 08:54:31AM -0500, Brijesh Singh wrote: > I replied to your previous comment. Depending on the npages value, the > __set_page_state() will be called multiple times and on each call it > needs to clear desc before populate it. Ah, now I missed it, sorry. > So, I do not see strong reason to use kzalloc() during the desc > allocation. Yeah, then you don't need it. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette