Messages in this thread | | | Date | Sat, 17 Mar 2018 20:05:06 -0400 (EDT) | Subject | Re: [PATCH v2 net 1/2] vmxnet3: avoid xmit reset due to a race in vmxnet3 | From | David Miller <> |
| |
From: Ronak Doshi <doshir@vmware.com> Date: Fri, 16 Mar 2018 14:47:54 -0700
> The field txNumDeferred is used by the driver to keep track of the number > of packets it has pushed to the emulation. The driver increments it on > pushing the packet to the emulation and the emulation resets it to 0 at > the end of the transmit. > > There is a possibility of a race either when (a) ESX is under heavy load or > (b) workload inside VM is of low packet rate. > > This race results in xmit hangs when network coalescing is disabled. This > change creates a local copy of txNumDeferred and uses it to perform ring > arithmetic. > > Reported-by: Noriho Tanaka <ntanaka@vmware.com> > Signed-off-by: Ronak Doshi <doshir@vmware.com> > Acked-by: Shrikrishna Khare <skhare@vmware.com>
Applied.
| |