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 263D0C433EF for ; Mon, 11 Apr 2022 15:31:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5B9C26B0072; Mon, 11 Apr 2022 11:31:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 568046B0073; Mon, 11 Apr 2022 11:31:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 408BC6B0074; Mon, 11 Apr 2022 11:31:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 312256B0072 for ; Mon, 11 Apr 2022 11:31:04 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id EAF2B61A80 for ; Mon, 11 Apr 2022 15:31:03 +0000 (UTC) X-FDA: 79344986406.12.83053D6 Received: from mail-lf1-f42.google.com (mail-lf1-f42.google.com [209.85.167.42]) by imf05.hostedemail.com (Postfix) with ESMTP id 57668100007 for ; Mon, 11 Apr 2022 15:31:03 +0000 (UTC) Received: by mail-lf1-f42.google.com with SMTP id u19so7213940lff.4 for ; Mon, 11 Apr 2022 08:31:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=xjS2P4qPRuklgAWHvx4nddXDONB01ig+sjZdob2rUZw=; b=FV3bsbjWahU5dJ0sji7/IJLbsnx56//V4Rko+5Sg47dXy4c+ztKWDHA1RNVD7WvPgr yK/qGVOHKnh25F0KE05KBV9H1r9OI30310p5PG2PDV1Va+D7E+zBPyJQ3GLPd+ArztSz lrPNi8EiBdyRuWMQK80WfVgqDFmgS3k2Y9eK88CTC7O93hqJ35i8F5cEA6skMGujcbeA 8BD+pN6zgnu4xfwTVNBKJBt2m4qBDjJnaxI/fb85Yf6i+HshEOjYKqNAq3V5w99m67cG eL4nyyZ+vUt0LJJW9FtrCg8OMzKVImZqDlCviEztwjVLYF/N6A1zGFbLaP9VZXnGa6f8 0s/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=xjS2P4qPRuklgAWHvx4nddXDONB01ig+sjZdob2rUZw=; b=l6q9P0vsu9AaLpPJudVBAEiAT4Hme3vaaDjegiQgyzeqS4KXsTaUDod7Iar+TE41xe vFGtJlvpKDi4Boh/CdQejlwZI9z8RYsOrOlv5I21TloEriYexC5lAh5+mOzXeUnhfaIi tu2pfOKNVz+xRPihKSd9AzUxMiNlLCvmTyLfomGxmnQefQCBKBBHXVtom85sDya13z30 6zazbHkTAfCSbxlbG9u2uU4ETHmosvHiS5tiREpzfaXW0AbZAvLw5xSbLPXOgsGC0Hhj Y8YVRqr+uj25eN5BvZQP5ktrM6xCNQicaK/DoA+8SgLWUbAU0pjHpBDW1Y5sBoHl/wkC jTpw== X-Gm-Message-State: AOAM533XrzZIwWjUR/wz+/lvdl4IDYJVgNaOtpdIca9z69wwbK++5nnV PuQBi8zgNVjQCn1BDCdFum32Kw== X-Google-Smtp-Source: ABdhPJyyKel4+BxKnE8zItkwufzaPuu1o/Qdf3y9wLaeW/pMks9H6z/sxphXdamwlvCAG9JGwj2NPg== X-Received: by 2002:a19:674c:0:b0:448:3f49:e6d5 with SMTP id e12-20020a19674c000000b004483f49e6d5mr22543031lfj.518.1649691061797; Mon, 11 Apr 2022 08:31:01 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id j4-20020a05651231c400b0044ac20061ecsm3351801lfe.128.2022.04.11.08.31.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Apr 2022 08:31:01 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id BF102103CE0; Mon, 11 Apr 2022 18:32:33 +0300 (+03) Date: Mon, 11 Apr 2022 18:32:33 +0300 From: "Kirill A. Shutemov" To: Sean Christopherson Cc: Chao Peng , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, qemu-devel@nongnu.org, Paolo Bonzini , Jonathan Corbet , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Hugh Dickins , Jeff Layton , "J . Bruce Fields" , Andrew Morton , Mike Rapoport , Steven Price , "Maciej S . Szmigiero" , Vlastimil Babka , Vishal Annapurve , Yu Zhang , "Kirill A . Shutemov" , luto@kernel.org, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, david@redhat.com Subject: Re: [PATCH v5 04/13] mm/shmem: Restrict MFD_INACCESSIBLE memory against RLIMIT_MEMLOCK Message-ID: <20220411153233.54ljmi7zgqovhgsn@box.shutemov.name> References: <20220310140911.50924-1-chao.p.peng@linux.intel.com> <20220310140911.50924-5-chao.p.peng@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: etjgya4gdta8r1o51tjcejtebzz9kf64 Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=shutemov-name.20210112.gappssmtp.com header.s=20210112 header.b=FV3bsbjW; spf=none (imf05.hostedemail.com: domain of kirill@shutemov.name has no SPF policy when checking 209.85.167.42) smtp.mailfrom=kirill@shutemov.name; dmarc=none X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 57668100007 X-HE-Tag: 1649691063-120220 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 Thu, Apr 07, 2022 at 04:05:36PM +0000, Sean Christopherson wrote: > Hmm, shmem_writepage() already handles SHM_F_INACCESSIBLE by rejecting the swap, so > maybe it's just the page migration path that needs to be updated? My early version prevented migration with -ENOTSUPP for address_space_operations::migratepage(). What's wrong with that approach? -- Kirill A. Shutemov