SRU: [PATCH] KVM: add schedule check to napi_enable call

[Stefan Bader]

On 02/05/2011 09:20 PM, Ken Stailey wrote:
> SRU Justification:
> 
> Impact: Under heavy network I/O load virtio-net driver crashes making VM guest unusable.
> 
> Testcase: I left a current Lucid VM running two concurrent "scp -r" of > 200 GB from NFS read-only source to a physical remote host overnight.  VM quickly started emitting "page allocation errors" in the system log.  Next morning when I checked the VM I could still ping it but could not establish an SSH connection.
> 
> Fix: This patch from Bruce Rogers at Novell
> 
>  * [PATCH] KVM: add schedule check to napi_enable call
>     - http://kerneltrap.org/mailarchive/linux-netdev/2010/6/4/6278660
> 
> BugLink: https://bugs.launchpad.net/bugs/579276
> 
> 
> 
The change is now upstream as

commit 3e9d08ec0a68f6faf718d5a7e050fe5ca0ba004f
Author: Bruce Rogers <brogers at novell.com>
Date:   Thu Feb 10 11:03:31 2011 -0800

    virtio_net: Add schedule check to napi_enable call

The change looks reasonable and has been verified. So I would add this to
Maverick and Lucid.

Acked-by: Stefan Bader <stefan.bader at canonical.com>