Re: [crash] Re: Latest brk patchset

[Jeremy Fitzhardinge <jeremy@goop.org>]

Yinghai Lu wrote:
> Jeremy Fitzhardinge wrote:
>   
>> Ingo Molnar wrote:
>>     
>>>> And the resulting kernel booted fine under qemu with 1Gbyte of
>>>> memory.  I'll try on real hardware a bit later, but it doesn't seem
>>>> like something that should be affected by qemu vs native, unless it
>>>> has something to do with the specific e820 map.
>>>>     
>>>>         
>>> Note that the crash was reproducible and it very clearly went away
>>> when i excluded those commits from tip:master.
>>>   
>>>       
>> Yep, and it looks like the kind of problem those changes might cause. 
>> But I can't reproduce it, and its not obvious to me what's actually
>> going wrong.  Any chance you could bisect the failure down to a specific
>> changeset, and print "start", "max_pfn_mapped" and "tables" where it fails?
>>
>>     
>
> could be max_pfn_mapped change in head_32.S that reduce mapping range to _end only.
>   

Oh, you mean rather than including all low memory?  Possible.  I can 
reproduce it now, so I should be able to sort it out now.

    J