Re: [PATCH V12] mm/debug: Add tests validating architecture page table helpers
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- To: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
- Subject: Re: [PATCH V12] mm/debug: Add tests validating architecture page table helpers
- From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
- Date: Thu, 30 Jan 2020 09:27:41 +0200
- Cc: Qian Cai <cai@xxxxxx>, Anshuman Khandual <anshuman.khandual@xxxxxxx>, Linux-MM <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>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, 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>, "Kirill A . Shutemov" <kirill@xxxxxxxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, 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: <20200129232044.2d133d98@thinkpad>
- References: <1580174873-18117-1-git-send-email-anshuman.khandual@arm.com> <14882A91-17DE-4ABD-ABF2-08E7CCEDF660@lca.pw> <214c0d53-eb34-9b0c-2e4e-1aa005146331@arm.com> <016A776F-EFD9-4D2B-A3A9-788008617D95@lca.pw> <20200129232044.2d133d98@thinkpad>
On Wed, Jan 29, 2020 at 11:20:44PM +0100, Gerald Schaefer wrote:
> On Mon, 27 Jan 2020 22:33:08 -0500
>
> For example, who would have thought that pXd_bad() is supposed to
> report large entries as bad? It's not really documented anywhere,
A bit off-topic,
@Anshuman, maybe you could start a Documentation/ patch that describes at
least some of the pXd_whaterver()?
Or that would be too much to ask? ;-)
> so we just checked them for sanity like normal entries, which
> apparently worked fine so far, but for how long?
--
Sincerely yours,
Mike.
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