Re: [RFC V2 0/1] mm/debug: Add tests for architecture exported page table helpers
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- To: Anshuman Khandual <anshuman.khandual@xxxxxxx>
- Subject: Re: [RFC V2 0/1] mm/debug: Add tests for architecture exported page table helpers
- From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
- Date: Fri, 9 Aug 2019 03:16:33 -0700
- Cc: linux-mm@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Mark Brown <broonie@xxxxxxxxxx>, Steven Price <Steven.Price@xxxxxxx>, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>, Sri Krishna chowdary <schowdary@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Vineet Gupta <vgupta@xxxxxxxxxxxx>, James Hogan <jhogan@xxxxxxxxxx>, Paul Burton <paul.burton@xxxxxxxx>, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, linux-snps-arc@xxxxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
- In-reply-to: <1565335998-22553-1-git-send-email-anshuman.khandual@arm.com>
- References: <1565335998-22553-1-git-send-email-anshuman.khandual@arm.com>
- User-agent: Mutt/1.11.4 (2019-03-13)
On Fri, Aug 09, 2019 at 01:03:17PM +0530, Anshuman Khandual wrote:
> Should alloc_gigantic_page() be made available as an interface for general
> use in the kernel. The test module here uses very similar implementation from
> HugeTLB to allocate a PUD aligned memory block. Similar for mm_alloc() which
> needs to be exported through a header.
Why are you allocating memory at all instead of just using some
known-to-exist PFNs like I suggested?
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