From: Minchan Kim <minchan.kim@gmail.com>
To: Uma shankar <shankar.vk@gmail.com>
Cc: linux-mm@kvack.org, arm-kernel@lists.arm.linux.org.uk
Subject: Re: 4-Kb page-size for kernel in ARM-Cortex
Date: Fri, 4 Jun 2010 21:32:34 +0900 [thread overview]
Message-ID: <20100604123234.GA1879@barrios-desktop> (raw)
In-Reply-To: <AANLkTimHrbAq1Q3Iu3wYGLDdeidYGgy2txaYkYhg5a_x@mail.gmail.com>
On Thu, Jun 03, 2010 at 08:13:35PM +0530, Uma shankar wrote:
> Hi,
>
> It is my understanding that in ARM, the MMU setting for
> kernel VA range ( 0xc0000000 onwards )
> is set up using the section-sized mapping ( 1 Mb in size ) , as this
> range maps to a contiguous physical address range.
>
> I am trying out a memory-checking tool on Cortex. This tool has the
> requirement that it needs to be able to set up PTE for each 4 Kb
> range of kernel address.
>
> So, paging_init ( arch/arm/mm/mmu.c ) is modified for this.
>
> But , with this MMU setting, the kernel hangs somewhere after
> freeing init memory. ( "freeing init mem" is the last print I see on
> console. )
>
> For 3-level page-table setting of kernel VA, do I have to change
> something else also ?
It's related to arm architecture.
Please, Cced linux-arm-kernel mailing list.
Maybe they can solve your problem.
P.S)
Please send your patch with question, symptom more detail and oops
if you can get it.
>
> thanks
>
> --
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--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2010-06-04 12:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-03 14:43 4-Kb page-size for kernel in ARM-Cortex Uma shankar
2010-06-04 12:32 ` Minchan Kim [this message]
2010-06-04 12:35 ` Minchan Kim
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