Re: [PATCH v3 08/34] ia64: mm: Add p?d_large() definitions
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- To: Steven Price <steven.price@xxxxxxx>
- Subject: Re: [PATCH v3 08/34] ia64: mm: Add p?d_large() definitions
- From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
- Date: Sat, 2 Mar 2019 00:57:28 +0300
- Cc: linux-mm@xxxxxxxxx, Andy Lutomirski <luto@xxxxxxxxxx>, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, James Morse <james.morse@xxxxxxx>, Jérôme Glisse <jglisse@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Mark Rutland <Mark.Rutland@xxxxxxx>, "Liang, Kan" <kan.liang@xxxxxxxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx
- In-reply-to: <20190227170608.27963-9-steven.price@arm.com>
- References: <20190227170608.27963-1-steven.price@arm.com> <20190227170608.27963-9-steven.price@arm.com>
- User-agent: NeoMutt/20180716
On Wed, Feb 27, 2019 at 05:05:42PM +0000, 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 ia64 leaf entries are always at the lowest level, so implement
> stubs returning 0.
Are you sure about this? I see pte_mkhuge defined for ia64 and Kconfig
contains hugetlb references.
--
Kirill A. Shutemov
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