lkml.org 
[lkml]   [2009]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PARAVIRT/x86] BUGFIX: Put a missing paravirt_release_pmd in pgd_dtor
Alok Kataria wrote:
> As it affects only VMI, instead of adding another callback, i have
> hooked on the paravirt_pgd_free call for vmi to release the pgd page.
> Below is the patch. I will run some overnight tests with this patch and
> get back if there are any errors.
>

I'd forgotten that I'd already added pgd_alloc/pgd_free. So, yes, just
use pgd_free.

>> But either way, calling release_pmd here is wrong, since its only meant
>> to be applied to pmds,
>>
> Maybe i misunderstand, but that's how it used to work before that
> commit, we had a single call to release_*pd*, no ?
>

I rearranged things, but I don't remember the details. I think pd was
being overloaded for both pgd and pmd, and I split it out so there was a
specific function for each level.

>> and it would break the Xen code.
>>
>
> i see xen doesn't define the alloc_pmd_clone call.
>

It defines alloc_pmd, but has no need for alloc_pmd_clone (there's no
shadow pagetable, so there's nothing to sync). Zach added specifically
for vmi's use.

J


\
 
 \ /
  Last update: 2009-02-06 07:55    [W:0.048 / U:0.740 seconds]
©2003-2014 Jasper Spaans. Advertise on this site