Re: [PATCH] MIPS: Octeon: Select CONFIG_HOLES_IN_ZONE

[Jason Kwon <jason.kwon@ericsson.com>]

On 08/19/2011 12:13 PM, Guenter Roeck wrote:
> On Fri, 2011-08-19 at 14:44 -0400, David Daney wrote:
>> Current Octeon systems do in fact have holes in their memory zones.
>> We need to select HOLES_IN_ZONE.  If we do not, some memory
>> configurations will result in crashes at boot time like this:
>>
>> .
>> .
>> .
>> CPU 6 Unable to handle kernel paging request at virtual address 0000000000700000, epc == ffffffff8118fe00, ra == ffffffff8118fe9c
>> Oops[#1]:
>> Cpu 6
>> .
>> .
>> .
>>          ...
>> Call Trace:
>> [<ffffffff8118fe00>] setup_per_zone_wmarks+0x1b0/0x338
>> [<ffffffff815cd738>] init_per_zone_wmark_min+0x64/0xd0
>> [<ffffffff81100438>] do_one_initcall+0x38/0x160
>> .
>> .
>> .
>>
>> Reported-by: Jason Kwon<jason.kwon@ericsson.com>
>> Signed-off-by: David Daney<david.daney@cavium.com>
>> Cc: Jason Kwon<jason.kwon@ericsson.com>
>> ---
>> Jason, can you test this patch?
>>
>> Ralf, if Jason reports that it fixes his problem, it probably is
>> needed for 3.0 and 3.1.
>>
> Your patch fixes the problem for the board with CN38xx and 2GB RAM that
> crashed previously.
>
> Tested-by: Guenter Roeck<guenter.roeck@ericsson.com>
>
> Thanks a lot for looking into this.
>
> Guenter
>
>

I applied the patch to 3.0.3 and was able to boot the CN58XX system 
without any memory restrictions.  The same patched kernel booted on 
CN38XX ran into a different problem, which I'm looking into.

Thanks,

Jason