On Thu, 13 Feb 2025 10:14:02 -0800 Breno Leitao wrote: > > The problem is a bit nasty, on a closer look. We don't know if netcons > > is called in IRQ context or not. How about we add an hrtimer to netdevsim, > > schedule it to fire 5usec in the future instead of scheduling NAPI > > immediately? We can call napi_schedule() from a timer safely. > > > > Unless there's another driver which schedules NAPI from xmit. > > Then we'd need to try harder to fix this in netpoll. > > veth does use NAPI on xmit but it sets IFF_DISABLE_NETPOLL already. > > Just to make sure I follow the netpoll issue. What would you like to fix > in netpoll exactly? Nothing in netpoll, the problem is that netdevsim calls napi_schedule from the xmit path. That's incompatible with netpoll. We should fix netdevsim instead (unless more real drivers need napi-from-xmit to work).
