Re: [RFC] arm: memtest

[Alexander Holler]

Am 08.11.2012 23:39, schrieb Yinghai Lu:
> On Thu, Nov 8, 2012 at 12:48 PM, Alexander Holler <holler@xxxxxxxxxxxxx> wrote:
> > Hello,
> >
> > I've recently discovered the lack of the command line parameter memtest for
> > ARM. So I've made a patch.
> >
> > But I have some questions:
> >
> > 1. arch/x86/mm/memtest.c looks platform independ.
> > The only thing why I don't use it for arm, is because it uses 64bit
> > pointers. Maybe it could be moved to mm/memtest.c. If so, the memtest32.c
> > I'm using (basically a copy of memtest.c) could be moved there too.
> >
> > 2. Because the below memtest32.c is basically a copy of
> > arch/x86/mm/memtest.c, I'm not sure if the mapping from physical to virtual
> > locations there does fit (always) for ARM too. I know almost as much about
> > the in-kernel memory organization on x86 as on ARM, which is not really that
> > much (some theory about TLBs, some source code explorations, ..., but I'm
> > working on it). ;)
>
> We are using arch/x86/mm/memtest.c for x86 32bit and 64bit.
>
> So it should be ok to use it with arm 32bit and 64bit directly.

It does. But in order to enable it on every boot, I wanted it to be as 
fast as possible.

Regards,

Alexander

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