Re: [net-next 04/11] ixgbevf: Add flag to indicate when rx is in net poll

On Tue, 13 Nov 2012 14:20:05 -0500
David Miller [off-list ref] wrote:

From: Jeff Kirsher <redacted>
Date: Tue, 13 Nov 2012 06:03:18 -0800

quoted

From: Greg Rose <redacted>

napi_gro_receive shouldn't be called from netpoll context.  Doing
so was causing kernel panics when jumbo frames larger than 2K were
set. Add a flag to check if the Rx ring processing is occurring
from interrupt context or from netpoll context and call netif_rx()
if in the polling context.

Signed-off-by: Greg Rose <redacted>
Tested-by: Sibai Li <redacted>
Signed-off-by: Jeff Kirsher <redacted>

This is not a scalable solution.

It is not prudent to have every single driver do a check like
this.  If using GRO receive from netpoll causes problems,
then it's a generic issue rather than a driver specific one.

OK, let me look into this a bit more then.

Thanks,

- Greg