[PATCH][v3] powerpc 44x: support for 256KB PAGE_SIZE

[Yuri Tikhonov]

Hello Prodyut,

On Monday, January 12, 2009 you wrote:

> On Sun, Jan 11, 2009 at 10:42 AM, Yuri Tikhonov <yur at emcraft.com> wrote:
>>
>> This patch adds support for 256KB pages on ppc44x-based boards.
>>

> Hi Yuri,
> Do you still need the mm/shmem.c patch to avoid division by zero?

 Yes.

> I looked at the mm/shmem.c latest git code, and I see that it doesn't
> have the needed patch for 256KB page.

 Right. We proposed the work-around for this (which just simply 
increased the sizes of variables which hold the overflowed values) to 
LKML here:

http://lkml.org/lkml/2008/12/19/20

 If I understand Hugh right, then such a fix is acceptable, but much 
far from the best, so Hugh is about to implement the correct fix for 
the problem as soon as he'll find some time (big thanks to him for 
this).

> I think another option would be to make 256KB compile only if CONFIG_SHMEM=n

 Agree. For the current situation it seems the better solution. I'll 
update, and re-post the patch shortly.

 Regards, Yuri

 --
 Yuri Tikhonov, Senior Software Engineer
 Emcraft Systems, www.emcraft.com