linux-kernel - Re: [PATCH 0/6] make memtest a generic kernel feature

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Date:	Tue, 17 Mar 2015 17:18:22 +0000
From:	Will Deacon <will.deacon@....com>
To:	Vladimir Murzin <Vladimir.Murzin@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"lauraa@...eaurora.org" <lauraa@...eaurora.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"arnd@...db.de" <arnd@...db.de>,
	Mark Rutland <Mark.Rutland@....com>,
	"ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>,
	"baruch@...s.co.il" <baruch@...s.co.il>,
	"rdunlap@...radead.org" <rdunlap@...radead.org>
Subject: Re: [PATCH 0/6] make memtest a generic kernel feature

On Mon, Mar 09, 2015 at 10:27:04AM +0000, Vladimir Murzin wrote:
> Memtest is a simple feature which fills the memory with a given set of
> patterns and validates memory contents, if bad memory regions is detected it
> reserves them via memblock API. Since memblock API is widely used by other
> architectures this feature can be enabled outside of x86 world.
> 
> This patch set promotes memtest to live under generic mm umbrella and enables
> memtest feature for arm/arm64.
> 
> It was reported that this patch set was useful for tracking down an issue with
> some errant DMA on an arm64 platform.
> 
> Since it touches x86 and mm bits it'd be great to get ACK/NAK for these bits.

Is your intention for akpm to merge this? I don't mind how it goes upstream,
but that seems like a sensible route to me.

Will

> Changelog:
> 
>     RFC -> v1
>         - updated kernel-parameters.txt for memtest entry
>         - updated number of test patterns in Kconfig menu
>         - added Acked/Tested tags for arm64 bits
>         - rebased on v4.0-rc3
> 
> Vladimir Murzin (6):
>   mm: move memtest under /mm
>   memtest: use phys_addr_t for physical addresses
>   arm64: add support for memtest
>   arm: add support for memtest
>   Kconfig: memtest: update number of test patterns up to 17
>   Documentation: update arch list in the 'memtest' entry
> 
>  Documentation/kernel-parameters.txt |    2 +-
>  arch/arm/mm/init.c                  |    3 +
>  arch/arm64/mm/init.c                |    2 +
>  arch/x86/Kconfig                    |   11 ----
>  arch/x86/include/asm/e820.h         |    8 ---
>  arch/x86/mm/Makefile                |    2 -
>  arch/x86/mm/memtest.c               |  118 -----------------------------------
>  include/linux/memblock.h            |    8 +++
>  lib/Kconfig.debug                   |   11 ++++
>  mm/Makefile                         |    1 +
>  mm/memtest.c                        |  118 +++++++++++++++++++++++++++++++++++
>  11 files changed, 144 insertions(+), 140 deletions(-)
>  delete mode 100644 arch/x86/mm/memtest.c
>  create mode 100644 mm/memtest.c
> 
> -- 
> 1.7.9.5
> 
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