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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CBD93C982E5 for ; Fri, 16 Jan 2026 18:17:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:Reply-To:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:CC:To: Subject:MIME-Version:Date:Message-ID:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aUUqM4GJCPiCpLDCHLsGueO/b/3hy8Au0HoTHwWcM9k=; b=ZElN/3CGTwV9HL cXGKiM7wuuxvU9q3FCG0UomOEBbgn04i2HnauzRGLert7KLA5yOmrRlDgu/y8bjHQOaG3dXjYETZ5 vpgeNyOvhEk3z8K8UUE77Rk4lG6DeixaC9ESOpgtgoBwsCLE1+NmYkP2XO7GhMQUEaSZewouOYven OMuhsCiuE4MFMjFjSZQyDxvb7M2YqCk0Fwatr5CcsUimalhMSpGG+1vJJPYs+p6QmWdETXuKQYsne JXCkAfKGfhDk5a1N002qDNAtgwLloD24cHFiVJ4wHJ4eYXfh6Wj8yCtfJpSYpVKMQ9b6RcSxSMtlE uT1bho9Vck+hMgGKQYfw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vgoNq-0000000EczJ-0Gus; Fri, 16 Jan 2026 18:17:18 +0000 Received: from fra-out-008.esa.eu-central-1.outbound.mail-perimeter.amazon.com ([35.158.23.94]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vgoNm-0000000Ecyv-3tKG; Fri, 16 Jan 2026 18:17:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1768587434; x=1800123434; h=message-id:date:mime-version:reply-to:subject:to:cc: references:from:in-reply-to:content-transfer-encoding; bh=YapVUMmpOwobMagVZxDJCeWDb1gq+ZQf1FJDAqu8vU0=; b=VYaDnNsOXe3tvOc0avSlLKzEgFfshIed65UMoY/one+laWq0gQq/14P+ EBPzYBmrmVtIpPQ7wVGYHnSCc8CFuL8UmxvfFesFjHNLwXt6EzV9c/IhE o9PaMdIC3a+q2omAnfI0H0obeQY9H+YfggP8LmZUYRK5sQwe3EgAQ3fW0 nyCEEMDUo631LFKxUt3q60eeHDTh4FuOJ1c4d7qK6mFI5pn7St/IpchkS jALxFm0nzKSNitH3cx9BLujUZfaa/JBcSce+km60Gr1UsqjAixs8hWFok mI7fuF58O2FGgtJp0hiVozzSB86C5HiYxRsm3Z4U9FiXo1SgruHMDMpd1 w==; X-CSE-ConnectionGUID: NWjda1oCRYKn9baULLv/sw== X-CSE-MsgGUID: IK3nVvd5RcyK2jXvKFHlAw== X-IronPort-AV: E=Sophos;i="6.21,231,1763424000"; d="scan'208";a="8025027" Received: from ip-10-6-11-83.eu-central-1.compute.internal (HELO smtpout.naws.eu-central-1.prod.farcaster.email.amazon.dev) ([10.6.11.83]) by internal-fra-out-008.esa.eu-central-1.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jan 2026 18:16:56 +0000 Received: from EX19MTAEUA001.ant.amazon.com [54.240.197.233:23681] by smtpin.naws.eu-central-1.prod.farcaster.email.amazon.dev [10.0.8.163:2525] with esmtp (Farcaster) id 6045a328-4a68-479c-a4ff-a5f3e38bc599; Fri, 16 Jan 2026 18:16:56 +0000 (UTC) X-Farcaster-Flow-ID: 6045a328-4a68-479c-a4ff-a5f3e38bc599 Received: from EX19D005EUB003.ant.amazon.com (10.252.51.31) by EX19MTAEUA001.ant.amazon.com (10.252.50.50) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Fri, 16 Jan 2026 18:16:53 +0000 Received: from [192.168.12.13] (10.106.82.9) by EX19D005EUB003.ant.amazon.com (10.252.51.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Fri, 16 Jan 2026 18:16:48 +0000 Message-ID: Date: Fri, 16 Jan 2026 18:16:47 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 07/13] KVM: guest_memfd: Add flag to remove from direct map To: "Edgecombe, Rick P" , "kalyazin@amazon.co.uk" , "linux-riscv@lists.infradead.org" , "linux-s390@vger.kernel.org" , "linux-mm@kvack.org" , "linux-fsdevel@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , "kernel@xen0n.name" , "kvmarm@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" , "bpf@vger.kernel.org" , "loongarch@lists.linux.dev" , "linux-doc@vger.kernel.org" CC: "david@kernel.org" , "svens@linux.ibm.com" , "catalin.marinas@arm.com" , "palmer@dabbelt.com" , "jgross@suse.com" , "surenb@google.com" , "vbabka@suse.cz" , "riel@surriel.com" , "pfalcato@suse.de" , "x86@kernel.org" , "rppt@kernel.org" , "thuth@redhat.com" , "borntraeger@linux.ibm.com" , "maz@kernel.org" , "peterx@redhat.com" , "ast@kernel.org" , "Annapurve, Vishal" , "pjw@kernel.org" , "alex@ghiti.fr" , "dave.hansen@linux.intel.com" , "tglx@linutronix.de" , "hca@linux.ibm.com" , "willy@infradead.org" , "wyihan@google.com" , "ryan.roberts@arm.com" , "yang@os.amperecomputing.com" , "jolsa@kernel.org" , "jmattson@google.com" , "luto@kernel.org" , "aneesh.kumar@kernel.org" , "haoluo@google.com" , "patrick.roy@linux.dev" , "akpm@linux-foundation.org" , "coxu@redhat.com" , "mhocko@suse.com" , "mlevitsk@redhat.com" , "jgg@ziepe.ca" , "hpa@zytor.com" , "song@kernel.org" , "Liam.Howlett@oracle.com" , "maobibo@loongson.cn" , "peterz@infradead.org" , "oupton@kernel.org" , "lorenzo.stoakes@oracle.com" , "jhubbard@nvidia.com" , "martin.lau@linux.dev" , "jthoughton@google.com" , "Jonathan.Cameron@huawei.com" , "Yu, Yu-cheng" , "eddyz87@gmail.com" , "yonghong.song@linux.dev" , "chenhuacai@kernel.org" , "shuah@kernel.org" , "prsampat@amd.com" , "kevin.brodsky@arm.com" , "shijie@os.amperecomputing.com" , "itazur@amazon.co.uk" , "suzuki.poulose@arm.com" , "pbonzini@redhat.com" , "dev.jain@arm.com" , "yuzenghui@huawei.com" , "gor@linux.ibm.com" , "jackabt@amazon.co.uk" , "daniel@iogearbox.net" , "agordeev@linux.ibm.com" , "andrii@kernel.org" , "mingo@redhat.com" , "aou@eecs.berkeley.edu" , "joey.gouly@arm.com" , "derekmn@amazon.com" , "xmarcalx@amazon.co.uk" , "kpsingh@kernel.org" , "sdf@fomichev.me" , "jackmanb@google.com" , "bp@alien8.de" , "corbet@lwn.net" , "ackerleytng@google.com" , "jannh@google.com" , "john.fastabend@gmail.com" , "kas@kernel.org" , "will@kernel.org" , "seanjc@google.com" References: <20260114134510.1835-1-kalyazin@amazon.com> <20260114134510.1835-8-kalyazin@amazon.com> <294bca75-2f3e-46db-bb24-7c471a779cc1@amazon.com> <318407ba-ecb6-4691-8911-645fb8c20250@amazon.com> <98b8ea1e-3bdd-4987-8acc-58112076d451@amazon.com> Content-Language: en-US From: Nikita Kalyazin Autocrypt: addr=kalyazin@amazon.com; keydata= xjMEY+ZIvRYJKwYBBAHaRw8BAQdA9FwYskD/5BFmiiTgktstviS9svHeszG2JfIkUqjxf+/N JU5pa2l0YSBLYWx5YXppbiA8a2FseWF6aW5AYW1hem9uLmNvbT7CjwQTFggANxYhBGhhGDEy BjLQwD9FsK+SyiCpmmTzBQJnrNfABQkFps9DAhsDBAsJCAcFFQgJCgsFFgIDAQAACgkQr5LK IKmaZPOpfgD/exazh4C2Z8fNEz54YLJ6tuFEgQrVQPX6nQ/PfQi2+dwBAMGTpZcj9Z9NvSe1 CmmKYnYjhzGxzjBs8itSUvWIcMsFzjgEY+ZIvRIKKwYBBAGXVQEFAQEHQCqd7/nb2tb36vZt ubg1iBLCSDctMlKHsQTp7wCnEc4RAwEIB8J+BBgWCAAmFiEEaGEYMTIGMtDAP0Wwr5LKIKma ZPMFAmes18AFCQWmz0MCGwwACgkQr5LKIKmaZPNTlQEA+q+rGFn7273rOAg+rxPty0M8lJbT i2kGo8RmPPLu650A/1kWgz1AnenQUYzTAFnZrKSsXAw5WoHaDLBz9kiO5pAK In-Reply-To: X-Originating-IP: [10.106.82.9] X-ClientProxiedBy: EX19D006EUA002.ant.amazon.com (10.252.50.65) To EX19D005EUB003.ant.amazon.com (10.252.51.31) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260116_101715_296761_3CE53095 X-CRM114-Status: UNSURE ( 9.28 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: kalyazin@amazon.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 16/01/2026 18:10, Edgecombe, Rick P wrote: > On Fri, 2026-01-16 at 17:51 +0000, Nikita Kalyazin wrote: >> Yes, this is a problem that we'd like to address. We have been >> discussing it in [1]. The effect of flushing on memory population >> that we see on x86 is 5-7x elongation. We are thinking of making use >> of the no-direct-map memory allocator that Brendan is working on [2]. > > Ah, makes sense. > > Do you plan to merge this before the performance problems are > addressed? I guess this series focuses on safety and functionality > first. Yes, we'd like to merge the functional part first and then optimise it in the further series. > _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv