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Shutemov" To: Helge Deller 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?SsOpcsO0bWU=?= Glisse , 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 Subject: Re: [PATCH v3 15/34] parisc: mm: Add p?d_large() definitions Message-ID: <20190301221213.snm7cwowr67pdifs@kshutemo-mobl1> References: <20190227170608.27963-1-steven.price@arm.com> <20190227170608.27963-16-steven.price@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 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, 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? -- Kirill A. Shutemov