VMI bug fix.

Tim Gardner tim.gardner at canonical.com
Tue Feb 17 03:31:12 GMT 2009

Alok Kataria wrote:
> Hi Tim, Stefan,
> Below is a patch which i posted on LKML, this fixes a critical bug in
> the VMI paravirt code. Without this patch users could see random hangs
> or performance drops running a VMI kernel. 
> Given that Ubuntu has PARAVIRT enabled by default, any 32bit kernel
> running on VMware platform will see this problem.
> This bug slipped in the kernel in 2.6.25 time frame. So the fix is
> needed only for the Ubuntu Intrepid and Jaunty series.
> Hardy is good in its current state.
> Here is the link to the LKML discussion. 
> http://lkml.org/lkml/2009/2/5/542
> The patch is merged in Ingo's tip tree and should be merged in mainline
> in the 29.rc-5 cycle. Commit details are
> -----------------------------------------------------------------
> commit 55a8ba4b7f76bebd7e8ce3f74c04b140627a1bad
> Author: Alok Kataria <akataria at vmware.com>
> Date:   Fri Feb 6 10:29:35 2009 -0800
>     x86, vmi: put a missing paravirt_release_pmd in pgd_dtor
> -----------------------------------------------------------------
> Attaching it below too.
> Please apply it to the Intrepid and Jaunty tree.
> Thanks,
> Alok
> --

Cherry picked from Linus tree. Thanks for the note.

Stefan - Is this on your todo list?

Tim Gardner tim.gardner at canonical.com

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