From: Ronak Doshi <dos...@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 <ntan...@vmware.com> > Signed-off-by: Ronak Doshi <dos...@vmware.com> > Acked-by: Shrikrishna Khare <skh...@vmware.com> Applied.
