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Date: Thu, 12 Sep 2019 16:42:25 +0200
From: Christophe Leroy <christophe.leroy@....fr>
To: Anshuman Khandual <anshuman.khandual@....com>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Vlastimil Babka <vbabka@...e.cz>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Mike Rapoport <rppt@...ux.vnet.ibm.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Dan Williams <dan.j.williams@...el.com>,
Peter Zijlstra <peterz@...radead.org>,
Michal Hocko <mhocko@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Mark Brown <broonie@...nel.org>,
Steven Price <Steven.Price@....com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Kees Cook <keescook@...omium.org>,
Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
Matthew Wilcox <willy@...radead.org>,
Sri Krishna chowdary <schowdary@...dia.com>,
Dave Hansen <dave.hansen@...el.com>,
Russell King - ARM Linux <linux@...linux.org.uk>,
Michael Ellerman <mpe@...erman.id.au>,
Paul Mackerras <paulus@...ba.org>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
"David S. Miller" <davem@...emloft.net>,
Vineet Gupta <vgupta@...opsys.com>,
James Hogan <jhogan@...nel.org>,
Paul Burton <paul.burton@...s.com>,
Ralf Baechle <ralf@...ux-mips.org>,
"Kirill A . Shutemov" <kirill@...temov.name>,
Gerald Schaefer <gerald.schaefer@...ibm.com>,
Mike Kravetz <mike.kravetz@...cle.com>,
linux-snps-arc@...ts.infradead.org, linux-mips@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 0/2] mm/debug: Add tests for architecture exported page
table helpers
Hi,
I didn't get patch 1 of this series, and it is not on linuxppc-dev
patchwork either. Can you resend ?
Thanks
Christophe
Le 12/09/2019 à 08:02, Anshuman Khandual a écrit :
> This series adds a test validation for architecture exported page table
> helpers. Patch in the series adds basic transformation tests at various
> levels of the page table. Before that it exports gigantic page allocation
> function from HugeTLB.
>
> This test was originally suggested by Catalin during arm64 THP migration
> RFC discussion earlier. Going forward it can include more specific tests
> with respect to various generic MM functions like THP, HugeTLB etc and
> platform specific tests.
>
> https://lore.kernel.org/linux-mm/20190628102003.GA56463@arrakis.emea.arm.com/
>
> Testing:
>
> Successfully build and boot tested on both arm64 and x86 platforms without
> any test failing. Only build tested on some other platforms.
>
> But I would really appreciate if folks can help validate this test on other
> platforms and report back problems. All suggestions, comments and inputs
> welcome. Thank you.
>
> Changes in V2:
>
> - Fixed small typo error in MODULE_DESCRIPTION()
> - Fixed m64k build problems for lvalue concerns in pmd_xxx_tests()
> - Fixed dynamic page table level folding problems on x86 as per Kirril
> - Fixed second pointers during pxx_populate_tests() per Kirill and Gerald
> - Allocate and free pte table with pte_alloc_one/pte_free per Kirill
> - Modified pxx_clear_tests() to accommodate s390 lower 12 bits situation
> - Changed RANDOM_NZVALUE value from 0xbe to 0xff
> - Changed allocation, usage, free sequence for saved_ptep
> - Renamed VMA_FLAGS as VMFLAGS
> - Implemented a new method for random vaddr generation
> - Implemented some other cleanups
> - Dropped extern reference to mm_alloc()
> - Created and exported new alloc_gigantic_page_order()
> - Dropped the custom allocator and used new alloc_gigantic_page_order()
>
> Changes in V1:
>
> https://lore.kernel.org/linux-mm/1567497706-8649-1-git-send-email-anshuman.khandual@arm.com/
>
> - Added fallback mechanism for PMD aligned memory allocation failure
>
> Changes in RFC V2:
>
> https://lore.kernel.org/linux-mm/1565335998-22553-1-git-send-email-anshuman.khandual@arm.com/T/#u
>
> - Moved test module and it's config from lib/ to mm/
> - Renamed config TEST_ARCH_PGTABLE as DEBUG_ARCH_PGTABLE_TEST
> - Renamed file from test_arch_pgtable.c to arch_pgtable_test.c
> - Added relevant MODULE_DESCRIPTION() and MODULE_AUTHOR() details
> - Dropped loadable module config option
> - Basic tests now use memory blocks with required size and alignment
> - PUD aligned memory block gets allocated with alloc_contig_range()
> - If PUD aligned memory could not be allocated it falls back on PMD aligned
> memory block from page allocator and pud_* tests are skipped
> - Clear and populate tests now operate on real in memory page table entries
> - Dummy mm_struct gets allocated with mm_alloc()
> - Dummy page table entries get allocated with [pud|pmd|pte]_alloc_[map]()
> - Simplified [p4d|pgd]_basic_tests(), now has random values in the entries
>
> Original RFC V1:
>
> https://lore.kernel.org/linux-mm/1564037723-26676-1-git-send-email-anshuman.khandual@arm.com/
>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Vlastimil Babka <vbabka@...e.cz>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Mike Rapoport <rppt@...ux.vnet.ibm.com>
> Cc: Jason Gunthorpe <jgg@...pe.ca>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Michal Hocko <mhocko@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Mark Brown <broonie@...nel.org>
> Cc: Steven Price <Steven.Price@....com>
> Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Cc: Kees Cook <keescook@...omium.org>
> Cc: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
> Cc: Matthew Wilcox <willy@...radead.org>
> Cc: Sri Krishna chowdary <schowdary@...dia.com>
> Cc: Dave Hansen <dave.hansen@...el.com>
> Cc: Russell King - ARM Linux <linux@...linux.org.uk>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Vineet Gupta <vgupta@...opsys.com>
> Cc: James Hogan <jhogan@...nel.org>
> Cc: Paul Burton <paul.burton@...s.com>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Kirill A. Shutemov <kirill@...temov.name>
> Cc: Gerald Schaefer <gerald.schaefer@...ibm.com>
> Cc: Christophe Leroy <christophe.leroy@....fr>
> Cc: Mike Kravetz <mike.kravetz@...cle.com>
> Cc: linux-snps-arc@...ts.infradead.org
> Cc: linux-mips@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-ia64@...r.kernel.org
> Cc: linuxppc-dev@...ts.ozlabs.org
> Cc: linux-s390@...r.kernel.org
> Cc: linux-sh@...r.kernel.org
> Cc: sparclinux@...r.kernel.org
> Cc: x86@...nel.org
> Cc: linux-kernel@...r.kernel.org
>
> Anshuman Khandual (2):
> mm/hugetlb: Make alloc_gigantic_page() available for general use
> mm/pgtable/debug: Add test validating architecture page table helpers
>
> arch/x86/include/asm/pgtable_64_types.h | 2 +
> include/linux/hugetlb.h | 9 +
> mm/Kconfig.debug | 14 +
> mm/Makefile | 1 +
> mm/arch_pgtable_test.c | 429 ++++++++++++++++++++++++
> mm/hugetlb.c | 24 +-
> 6 files changed, 477 insertions(+), 2 deletions(-)
> create mode 100644 mm/arch_pgtable_test.c
>
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