From: Ingo Molnar <mingo@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>,
Michal Hocko <mhocko@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>,
Jason Gunthorpe <jgg@ziepe.ca>,
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>,
Vlastimil Babka <vbabka@suse.cz>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linux-kernel@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vineet Gupta <vgupta@synopsys.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 12 Nov 2019 06:29:51 +0000 [thread overview]
Message-ID: <20191112062951.GA100264@gmail.com> (raw)
In-Reply-To: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com>
* Anshuman Khandual <anshuman.khandual@arm.com> wrote:
> +config DEBUG_VM_PGTABLE
> + bool "Debug arch page table for semantics compliance"
> + depends on MMU
> + depends on DEBUG_VM
> + depends on ARCH_HAS_DEBUG_VM_PGTABLE
> + help
> + This option provides a debug method which can be used to test
> + architecture page table helper functions on various platforms in
> + verifying if they comply with expected generic MM semantics. This
> + will help architecture code in making sure that any changes or
> + new additions of these helpers still conform to expected
> + semantics of the generic MM.
> +
> + If unsure, say N.
Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages,
why not make this 'default y' to maximize testing coverage? The code size
increase should be minimal, and DEBUG_VM increases size anyway.
Other than that this looks good to me:
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@kernel.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Dan Williams <dan.j.williams@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Michal Hocko <mhocko@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mark Brown <broonie@kernel.org>,
Steven Price <Steven.Price@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Kees Cook <keescook@chromium.org>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Matthew Wilcox <willy@infradead.org>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Dave Hansen <dave.hansen@intel.com>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
Michael Ellerman <mpe@ellerman.id.au>,
Paul Mackerras <paulus@samba.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
Vineet Gupta <vgupta@synopsys.com>,
James Hogan <jhogan@kernel.org>,
Paul Burton <paul.burton@mips.com>,
Ralf Baechle <ralf@linux-mips.org>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 12 Nov 2019 07:29:51 +0100 [thread overview]
Message-ID: <20191112062951.GA100264@gmail.com> (raw)
In-Reply-To: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com>
* Anshuman Khandual <anshuman.khandual@arm.com> wrote:
> +config DEBUG_VM_PGTABLE
> + bool "Debug arch page table for semantics compliance"
> + depends on MMU
> + depends on DEBUG_VM
> + depends on ARCH_HAS_DEBUG_VM_PGTABLE
> + help
> + This option provides a debug method which can be used to test
> + architecture page table helper functions on various platforms in
> + verifying if they comply with expected generic MM semantics. This
> + will help architecture code in making sure that any changes or
> + new additions of these helpers still conform to expected
> + semantics of the generic MM.
> +
> + If unsure, say N.
Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages,
why not make this 'default y' to maximize testing coverage? The code size
increase should be minimal, and DEBUG_VM increases size anyway.
Other than that this looks good to me:
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@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>,
Michal Hocko <mhocko@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>,
Jason Gunthorpe <jgg@ziepe.ca>,
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>,
Vlastimil Babka <vbabka@suse.cz>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linux-kernel@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vineet Gupta <vgupta@synopsys.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 12 Nov 2019 07:29:51 +0100 [thread overview]
Message-ID: <20191112062951.GA100264@gmail.com> (raw)
In-Reply-To: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com>
* Anshuman Khandual <anshuman.khandual@arm.com> wrote:
> +config DEBUG_VM_PGTABLE
> + bool "Debug arch page table for semantics compliance"
> + depends on MMU
> + depends on DEBUG_VM
> + depends on ARCH_HAS_DEBUG_VM_PGTABLE
> + help
> + This option provides a debug method which can be used to test
> + architecture page table helper functions on various platforms in
> + verifying if they comply with expected generic MM semantics. This
> + will help architecture code in making sure that any changes or
> + new additions of these helpers still conform to expected
> + semantics of the generic MM.
> +
> + If unsure, say N.
Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages,
why not make this 'default y' to maximize testing coverage? The code size
increase should be minimal, and DEBUG_VM increases size anyway.
Other than that this looks good to me:
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
_______________________________________________
linux-snps-arc mailing list
linux-snps-arc@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-snps-arc
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@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>,
Michal Hocko <mhocko@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, x86@kernel.org,
Russell King - ARM Linux <linux@armlinux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Steven Price <Steven.Price@arm.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
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>,
Vlastimil Babka <vbabka@suse.cz>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linux-kernel@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vineet Gupta <vgupta@synopsys.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 12 Nov 2019 07:29:51 +0100 [thread overview]
Message-ID: <20191112062951.GA100264@gmail.com> (raw)
In-Reply-To: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com>
* Anshuman Khandual <anshuman.khandual@arm.com> wrote:
> +config DEBUG_VM_PGTABLE
> + bool "Debug arch page table for semantics compliance"
> + depends on MMU
> + depends on DEBUG_VM
> + depends on ARCH_HAS_DEBUG_VM_PGTABLE
> + help
> + This option provides a debug method which can be used to test
> + architecture page table helper functions on various platforms in
> + verifying if they comply with expected generic MM semantics. This
> + will help architecture code in making sure that any changes or
> + new additions of these helpers still conform to expected
> + semantics of the generic MM.
> +
> + If unsure, say N.
Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages,
why not make this 'default y' to maximize testing coverage? The code size
increase should be minimal, and DEBUG_VM increases size anyway.
Other than that this looks good to me:
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@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>,
Michal Hocko <mhocko@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>,
Jason Gunthorpe <jgg@ziepe.ca>,
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>,
Vlastimil Babka <vbabka@suse.cz>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-mips@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linux-kernel@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vineet Gupta <vgupta@synopsys.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers
Date: Tue, 12 Nov 2019 07:29:51 +0100 [thread overview]
Message-ID: <20191112062951.GA100264@gmail.com> (raw)
In-Reply-To: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com>
* Anshuman Khandual <anshuman.khandual@arm.com> wrote:
> +config DEBUG_VM_PGTABLE
> + bool "Debug arch page table for semantics compliance"
> + depends on MMU
> + depends on DEBUG_VM
> + depends on ARCH_HAS_DEBUG_VM_PGTABLE
> + help
> + This option provides a debug method which can be used to test
> + architecture page table helper functions on various platforms in
> + verifying if they comply with expected generic MM semantics. This
> + will help architecture code in making sure that any changes or
> + new additions of these helpers still conform to expected
> + semantics of the generic MM.
> +
> + If unsure, say N.
Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages,
why not make this 'default y' to maximize testing coverage? The code size
increase should be minimal, and DEBUG_VM increases size anyway.
Other than that this looks good to me:
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Thanks,
Ingo
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-11-12 6:29 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 4:18 [PATCH V9] mm/debug: Add tests validating architecture page table helpers Anshuman Khandual
2019-11-12 4:30 ` Anshuman Khandual
2019-11-12 4:18 ` Anshuman Khandual
2019-11-12 4:18 ` Anshuman Khandual
2019-11-12 4:18 ` Anshuman Khandual
2019-11-12 4:38 ` Anshuman Khandual
2019-11-12 4:50 ` Anshuman Khandual
2019-11-12 4:38 ` Anshuman Khandual
2019-11-12 4:38 ` Anshuman Khandual
2019-11-12 4:38 ` Anshuman Khandual
2019-11-12 6:29 ` Ingo Molnar [this message]
2019-11-12 6:29 ` Ingo Molnar
2019-11-12 6:29 ` Ingo Molnar
2019-11-12 6:29 ` Ingo Molnar
2019-11-12 6:29 ` Ingo Molnar
2019-11-12 6:52 ` Anshuman Khandual
2019-11-12 6:52 ` Anshuman Khandual
2019-11-12 6:52 ` Anshuman Khandual
2019-11-12 6:52 ` Anshuman Khandual
2019-11-12 6:52 ` Anshuman Khandual
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