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From: Uma shankar <shankar.vk@gmail.com>
To: linux-mm@kvack.org
Subject: 4-Kb page-size for kernel in ARM-Cortex
Date: Thu, 3 Jun 2010 20:13:35 +0530	[thread overview]
Message-ID: <AANLkTimHrbAq1Q3Iu3wYGLDdeidYGgy2txaYkYhg5a_x@mail.gmail.com> (raw)

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 ?

              thanks

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             reply	other threads:[~2010-06-03 14:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-03 14:43 Uma shankar [this message]
2010-06-04 12:32 ` 4-Kb page-size for kernel in ARM-Cortex Minchan Kim
2010-06-04 12:35   ` Minchan Kim

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