[ovs-dev] [PATCH 1/2] datapath: Don't free vport until all references are gone.

Ben Pfaff blp at nicira.com
Fri Feb 25 01:07:15 UTC 2011

On Thu, Feb 24, 2011 at 04:23:06PM -0800, Jesse Gross wrote:
> We currently call vport_free() for internal devices after the
> device is unregistered.  This takes care of callers that use
> either RTNL or RCU but not ones that have only a device reference.
> In particular, if stats are requested while a datapath is being
> unregistered we can try to use the vport data structures which
> have already been freed.
> Bug #4736
> Signed-off-by: Jesse Gross <jesse at nicira.com>

I guess that you are talking about a stats request that comes through
the network stack, not one that comes through the Open vSwitch userspace
interface?  Good catch.  Thanks!

Acked-by: Ben Pfaff <blp at nicira.com>

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