From: Michal Hocko <mhocko@kernel.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
James Hogan <jhogan@kernel.org>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Dave Hansen <dave.hansen@intel.com>,
Paul Mackerras <paulus@samba.org>,
sparclinux@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
linux-s390@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
x86@kernel.org, Russell King - ARM Linux <linux@armlinux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Steven Price <Steven.Price@arm.com>,
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Gerald Schaefer <gerald.schaefer@de.ibm.com>,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Kees Cook <keescook@chromium.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Mark Brown <broonie@kernel.org>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
Dan Williams <dan.j.williams@intel.com>,
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Paul Burton <paul.burton@mips.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vineet Gupta <vgupta@synopsys.com>,
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Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V6 2/2] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 15 Oct 2019 13:46:11 +0200 [thread overview]
Message-ID: <20191015114611.GC317@dhcp22.suse.cz> (raw)
In-Reply-To: <1571131302-32290-3-git-send-email-anshuman.khandual@arm.com>
On Tue 15-10-19 14:51:42, Anshuman Khandual wrote:
> This adds tests which will validate architecture page table helpers and
> other accessors in their compliance with expected generic MM semantics.
> This will help various architectures in validating changes to existing
> page table helpers or addition of new ones.
>
> Test page table and memory pages creating it's entries at various level are
> all allocated from system memory with required size and alignments. But if
> memory pages with required size and alignment could not be allocated, then
> all depending individual tests are just skipped afterwards. This test gets
> called right after init_mm_internals() required for alloc_contig_range() to
> work correctly.
>
> This gets build and run when CONFIG_DEBUG_VM_PGTABLE is selected along with
> CONFIG_VM_DEBUG. Architectures willing to subscribe this test also need to
> select CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE which for now is limited to x86 and
> arm64. Going forward, other architectures too can enable this after fixing
> build or runtime problems (if any) with their page table helpers.
A highlevel description of tests and what they are testing for would be
really appreciated. Who wants to run these tests and why/when? What kind
of bugs would get detected? In short why do we really need/want this
code in the tree?
--
Michal Hocko
SUSE Labs
_______________________________________________
linux-snps-arc mailing list
linux-snps-arc@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-snps-arc
next prev parent reply other threads:[~2019-10-15 11:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1571131302-32290-1-git-send-email-anshuman.khandual@arm.com>
[not found] ` <1571131302-32290-2-git-send-email-anshuman.khandual@arm.com>
2019-10-15 10:45 ` [PATCH V6 1/2] mm/page_alloc: Make alloc_gigantic_page() available for general use Michal Hocko
2019-10-15 11:07 ` Anshuman Khandual
2019-10-15 11:42 ` David Hildenbrand
2019-10-15 11:47 ` Michal Hocko
2019-10-15 11:50 ` David Hildenbrand
2019-10-15 12:01 ` David Hildenbrand
2019-10-15 12:09 ` Michal Hocko
2019-10-15 12:11 ` Michal Hocko
[not found] ` <1571131302-32290-3-git-send-email-anshuman.khandual@arm.com>
2019-10-15 11:46 ` Michal Hocko [this message]
2019-10-15 12:27 ` [PATCH V6 2/2] mm/debug: Add tests validating architecture page table helpers Anshuman Khandual
2019-10-15 18:09 ` Qian Cai
2019-10-16 9:54 ` Anshuman Khandual
2019-10-15 14:41 ` [PATCH V6 0/2] " Qian Cai
2019-10-15 15:21 ` Anshuman Khandual
2019-10-15 18:42 ` Qian Cai
2019-10-16 8:59 ` Anshuman Khandual
2019-10-16 8:20 ` Michal Hocko
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