Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwork for64-bit Xen support

[Jeremy Fitzhardinge]

Ingo Molnar wrote:
> yeah, i guess so. Right now i only ran into the build failure so there's 
> hope :) Here's a config that fails to build for sure:
>
>   http://redhat.com/~mingo/misc/config-Fri_Jun_27_17_54_32_CEST_2008.bad
>   

Will look at it shortly.

> note, on 32-bit there's a yet unfixed initrd corruption bug i've 
> bisected back to:
>
> | 510be56adc4bb9fb229637a8e89268d987263614 is first bad commit
> | commit 510be56adc4bb9fb229637a8e89268d987263614
> | Author: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
> | Date:   Tue Jun 24 04:10:47 2008 -0700
> |
> |    x86: introduce init_memory_mapping for 32bit
>
> so if you see something like that it's probably not a bug introduced by 
> your changes. (and maybe you'll see why the above commit is buggy, i 
> havent figured it out yet)

Well, on a non-PSE system find_early_table_space() will not allocate 
enough memory for ptes.  But I posted the fix for that, and it's likely 
you're using PSE anyway.  Nothing pops out from a quick re-read, but it 
could easily be mis-reserving the ramdisk memory or something.

   J
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