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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9123EC433FE for ; Wed, 30 Nov 2022 16:09:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229979AbiK3QJK (ORCPT ); Wed, 30 Nov 2022 11:09:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229612AbiK3QJI (ORCPT ); Wed, 30 Nov 2022 11:09:08 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5403F175AC for ; Wed, 30 Nov 2022 08:08:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1669824494; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iVNwuW5+uccfiZVDEZIcPICj3awEkrtKMxi+jom/QYY=; b=NNnbKagMMit73LKJchiwPePVj7eID1gZstjvZjRkG3DkIEMq88GI3idmfIGJjkPbv3orwU wuBhQflD2+7sDMPwqTN8hD809Sr9VPK3RtUhSVpk84UPBbrdnI50CmkyrPkOldkVAlMzs3 W0dbz2WjAof8Uw2LJyo3/XdMe/jsFt0= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-158-8F99FeFNMxGq8KoMPNNnEg-1; Wed, 30 Nov 2022 11:08:10 -0500 X-MC-Unique: 8F99FeFNMxGq8KoMPNNnEg-1 Received: by mail-wm1-f70.google.com with SMTP id 1-20020a05600c028100b003cf7833293cso1170589wmk.3 for ; Wed, 30 Nov 2022 08:08:10 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:organization:from:references :cc:to:content-language:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=iVNwuW5+uccfiZVDEZIcPICj3awEkrtKMxi+jom/QYY=; b=swQxrwnEYOlLuG8DpAte6le11yjXw0K5umEhYwbtGE9ZkrW8w27bRFYojpOl09gCcS rCSbF3yXj5uKXlkmDVEmNdgyncl2QQ0qTvgQK8ExhNDYLkzdXGhS1Oftfjcxj+LKVz3y BO8BLsnxygJ9QhGy9HNTJ8TlCUrwXVyRWYE9uPYZ0TouiIvUuFJoS2VJ3EjZGsMWnczH FiUi45jCciXEP/Munp1M0oSfOpbnGDQaXxVkXwKCKkJedW3lblm8wvCrEK9kBGtyuh3t 1AtC7XJZhixK8kfdsRod6jtwtB8gMQb2Tqvxwg8h/pagNqX27vBm6+I0S2Ig0EsjzkrC JOIQ== X-Gm-Message-State: ANoB5pm2OdqPLmAvDj+M/7JK8+0cDD5wfPyxz5dpOhvXpW7j9Z5F3T9H 0dg/3uYLoS9T4FuMjWSLLU5CoP7K5Chj8WaQSADezy46ln0qKT3SnEMhjjSg90jCsOXwHpG0cJB fwBIvvvUE3jJnm9jjQXDRtbXB X-Received: by 2002:a5d:5045:0:b0:242:199a:e067 with SMTP id h5-20020a5d5045000000b00242199ae067mr8932745wrt.148.1669824489133; Wed, 30 Nov 2022 08:08:09 -0800 (PST) X-Google-Smtp-Source: AA0mqf6tLsczYE+jaX+/S4Ke5H1PV9UVJEwf0u6/NzgVOF1skht049dP36B4OFnIUthpVzBMHDu/2A== X-Received: by 2002:a5d:5045:0:b0:242:199a:e067 with SMTP id h5-20020a5d5045000000b00242199ae067mr8932724wrt.148.1669824488885; Wed, 30 Nov 2022 08:08:08 -0800 (PST) Received: from ?IPV6:2003:cb:c703:7600:a8ea:29ce:7ee3:dd41? (p200300cbc7037600a8ea29ce7ee3dd41.dip0.t-ipconnect.de. [2003:cb:c703:7600:a8ea:29ce:7ee3:dd41]) by smtp.gmail.com with ESMTPSA id e25-20020a05600c4b9900b003cf4ec90938sm2220657wmp.21.2022.11.30.08.08.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Nov 2022 08:08:08 -0800 (PST) Message-ID: Date: Wed, 30 Nov 2022 17:08:07 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH 05/10] mm/hugetlb: Make userfaultfd_huge_must_wait() safe to pmd unshare Content-Language: en-US To: Peter Xu , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: James Houghton , Jann Horn , Andrew Morton , Andrea Arcangeli , Rik van Riel , Nadav Amit , Miaohe Lin , Muchun Song , Mike Kravetz References: <20221129193526.3588187-1-peterx@redhat.com> <20221129193526.3588187-6-peterx@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20221129193526.3588187-6-peterx@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 29.11.22 20:35, Peter Xu wrote: > We can take the hugetlb walker lock, here taking vma lock directly. > > Signed-off-by: Peter Xu > --- Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb