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=-0.7 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 B9412C4360F for ; Tue, 5 Mar 2019 21:46:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9278420652 for ; Tue, 5 Mar 2019 21:46:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727529AbfCEVqm (ORCPT ); Tue, 5 Mar 2019 16:46:42 -0500 Received: from mout.gmx.net ([212.227.15.19]:40353 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726392AbfCEVql (ORCPT ); Tue, 5 Mar 2019 16:46:41 -0500 Received: from [192.168.20.60] ([92.116.130.110]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MRo6b-1gYr0x3lqj-00StVO; Tue, 05 Mar 2019 22:45:59 +0100 Subject: Re: [PATCH v3 15/34] parisc: mm: Add p?d_large() definitions To: "Kirill A. Shutemov" Cc: Steven Price , linux-mm@kvack.org, Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , "James E.J. Bottomley" , linux-parisc@vger.kernel.org References: <20190227170608.27963-1-steven.price@arm.com> <20190227170608.27963-16-steven.price@arm.com> <20190301221213.snm7cwowr67pdifs@kshutemo-mobl1> From: Helge Deller Openpgp: preference=signencrypt Autocrypt: addr=deller@gmx.de; keydata= xsBNBFDPIPYBCAC6PdtagIE06GASPWQJtfXiIzvpBaaNbAGgmd3Iv7x+3g039EV7/zJ1do/a y9jNEDn29j0/jyd0A9zMzWEmNO4JRwkMd5Z0h6APvlm2D8XhI94r/8stwroXOQ8yBpBcP0yX +sqRm2UXgoYWL0KEGbL4XwzpDCCapt+kmarND12oFj30M1xhTjuFe0hkhyNHkLe8g6MC0xNg KW3x7B74Rk829TTAtj03KP7oA+dqsp5hPlt/hZO0Lr0kSAxf3kxtaNA7+Z0LLiBqZ1nUerBh OdiCasCF82vQ4/y8rUaKotXqdhGwD76YZry9AQ9p6ccqKaYEzWis078Wsj7p0UtHoYDbABEB AAHNHEhlbGdlIERlbGxlciA8ZGVsbGVyQGdteC5kZT7CwJIEEwECADwCGwMGCwkIBwMCBhUI AgkKCwQWAgMBAh4BAheAFiEE9M/0wAvkPPtRU6Boh8nBUbUeOGQFAlrHzIICGQEACgkQh8nB UbUeOGT1GAgAt+EeoHB4DbAx+pZoGbBYp6ZY8L6211n8fSi7wiwgM5VppucJ+C+wILoPkqiU +ZHKlcWRbttER2oBUvKOt0+yDfAGcoZwHS0P+iO3HtxR81h3bosOCwek+TofDXl+TH/WSQJa iaitof6iiPZLygzUmmW+aLSSeIAHBunpBetRpFiep1e5zujCglKagsW78Pq0DnzbWugGe26A 288JcK2W939bT1lZc22D9NhXXRHfX2QdDdrCQY7UsI6g/dAm1d2ldeFlGleqPMdaaQMcv5+E vDOur20qjTlenjnR/TFm9tA1zV+K7ePh+JfwKc6BSbELK4EHv8J8WQJjfTphakYLVM7ATQRQ zyD2AQgA2SJJapaLvCKdz83MHiTMbyk8yj2AHsuuXdmB30LzEQXjT3JEqj1mpvcEjXrX1B3h +0nLUHPI2Q4XWRazrzsseNMGYqfVIhLsK6zT3URPkEAp7R1JxoSiLoh4qOBdJH6AJHex4CWu UaSXX5HLqxKl1sq1tO8rq2+hFxY63zbWINvgT0FUEME27Uik9A5t8l9/dmF0CdxKdmrOvGMw T770cTt76xUryzM3fAyjtOEVEglkFtVQNM/BN/dnq4jDE5fikLLs8eaJwsWG9k9wQUMtmLpL gRXeFPRRK+IT48xuG8rK0g2NOD8aW5ThTkF4apznZe74M7OWr/VbuZbYW443QQARAQABwsBf BBgBAgAJBQJQzyD2AhsMAAoJEIfJwVG1HjhkNTgH/idWz2WjLE8DvTi7LvfybzvnXyx6rWUs 91tXUdCzLuOtjqWVsqBtSaZynfhAjlbqRlrFZQ8i8jRyJY1IwqgvHP6PO9s+rIxKlfFQtqhl kR1KUdhNGtiI90sTpi4aeXVsOyG3572KV3dKeFe47ALU6xE5ZL5U2LGhgQkbjr44I3EhPWc/ lJ/MgLOPkfIUgjRXt0ZcZEN6pAMPU95+u1N52hmqAOQZvyoyUOJFH1siBMAFRbhgWyv+YE2Y ZkAyVDL2WxAedQgD/YCCJ+16yXlGYGNAKlvp07SimS6vBEIXk/3h5Vq4Hwgg0Z8+FRGtYZyD KrhlU0uMP9QTB5WAUvxvGy8= Message-ID: <6d2bc08b-d336-1b1a-2408-6259dafff995@gmx.de> Date: Tue, 5 Mar 2019 22:45:55 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <20190301221213.snm7cwowr67pdifs@kshutemo-mobl1> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:LdLxPVii8ZtTFSzQTHGX/xHJKUnsknfi5/X+gB/PzHjktFyjw4X qKKtlrR+3kluRrRkObR/s+jd+5A00AT3VdqIHUj3NAuH7L23fRp4hj2q4b6uXoYSv7gCg37 9+bmlps0QIP0hHILRXnGjB53IQG26fmh22jSuDvpR9+XdUgQltKRTxWKrHQdMyo6dLC9uCl e/V2AkiGVtdD2CAE7+CUA== X-UI-Out-Filterresults: notjunk:1;V03:K0:HktD2wX0SxY=:TZE6v4h4jobkREHdJwbGx8 BWzDw3iX8u+XXdCOfOLaxSsJA7VV1dHMh5unrQsl3AZkt8PZZF89XlTSIuKRFkSbqPw35EEEl +GvV1tII9xNLY21OZwsNgasmUsStflRtpSbQdjuH6IBwr6hlZqL+A5USD3rMRPq0OYnykPKGi Hz0/mHZhIuSn1lq7pGTBxiIsN8YQjFSvJDkUfT1xeoOOKD+t+XbfWdCvWQq6r/RfrEi2IJJqM ry8TJJFrnkCLEGns9Zx/BIV9hjRhCR91PnmkMdfrQuqu926+pujR/9mcKgDMqf1NaZhapif8g qhc6SG8nhdrxZyPxE1XRXY8wSsOLFz/gDr3GW4BzFlUQCl+KgGjW469L/ZYOGngSkKxyDeUmc Ro3PUtyxOOr3R2Cmekis/SI/ZBkq8p85QbFNXfm3DWMf6yNMTo1PkLsdrnbekkuZGr1y/tRI5 WuQsnfx1KTUBcUdc8ShEw8bjfVaj2d/HRRs5Q6lLcY7LsCzDUQYAyeLNHXJjeT3nZiq/JVb+Y 3Deu5RSBG3mzFFLyKYCWLyWfKjSUPZDv61D5iMAAQ5jr730M9J74GmYXM//P54jPGxoSg+esy fUeOIDtx9Sn2tF3daNFwUayrfe0R6Xqht+8AZeAqqlaYhWdJDUrePu93SD8sCB4nKIfeop+s0 f7pbCrae5StemWN0KnN187j/V6JlednDsEnp2PEuokQICT+v3eyjMCL0iKcNFgyikpif2O+kI eTj564By3p6f3I5ViS6HmHiedEgfY9Yq/FEDQD+k7QfdNs3e3TIlRDKXDhatgisKMpBJAWdy6 gJ/xjtp/rsZ7k7IaaVNxoJC4r3DH5LopwcYJKYY1e41rj1upzE2CwSq0fJPLvceXcNDHjkDy1 DYMotrIdKhNiRBvFsdywLcb4SpgFDEtoi8gZOyEPHlcwRYkxPtr9kCIDz0I8l+ Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01.03.19 23:12, Kirill A. Shutemov wrote: > On Wed, Feb 27, 2019 at 07:54:22PM +0100, Helge Deller wrote: >> On 27.02.19 18:05, Steven Price wrote: >>> walk_page_range() is going to be allowed to walk page tables other than >>> those of user space. For this it needs to know when it has reached a >>> 'leaf' entry in the page tables. This information is provided by the >>> p?d_large() functions/macros. >>> >>> For parisc, we don't support large pages, so add stubs returning 0. >> >> We do support huge pages on parisc, but not yet on those levels. > > Just curious, what level do parisc supports huge pages on? > AFAICS, it can have 2- or 3- level paging and the patch defines helpers > for two level: pgd and pmd. Hm? You are correct. My comment was misleading and meant to say that we do support generic huge pages for applications. Helge