On Wed, 24 Feb 2021 17:06:13 -0800 Wei Wang wrote: > I really have a hard time reproducing the warning Martin was seeing in > his setup. The difference between my setup and his is that mine uses > mlx4 driver, while Martin is using ixgbe driver. > > To keep everyone up to date with Martin's previous email, with this > patch applied to 5.11.1, the following warning is triggered when > enabling threaded mode without enabling busy poll: > echo 1 > /sys/class/net/eth0/threaded > echo 1 > /sys/class/net/eth1/threaded > echo 1 > /sys/class/net/eth2/threaded > echo 1 > /sys/class/net/eth3/threaded > > Warning message: > [...] > > This is the line in net/core/dev.c:6993 > WARN_ON(!list_empty(&napi->poll_list)); > in napi_threaded wait() > > Martin, do you think the driver version you are using could be at fault here?
We do kthread_run() meaning the thread gets immediately woken up, even when sirq is polling the NAPI and owns it. Right?
