On Tue, 30 Jun 2026 16:41:44 -0700 Mina Almasry wrote: > > Can y'all not open a pidfs fd for the NAPI thread? You'll get a > > notification when the existing kthread dies? > > Let me take a look, but I think we need a notification when the > kthread is back up to reconfigure it. I guess if we're trying very > hard not to touch the current code we can always monitor the running > napi kthreads and their affinity and work around it like that.
To be clear -- I don't mind making changes. My first reaction was to suggest adding Netlink notifications for when NAPIs are created / removed. That's the standard Netlink way of letting the user space do what's needed without adding kernel complexity. Then I remembered pidfs can probably already do it. The kernel threads for NAPI, and the state transitions are already quite hairy. Plus keeping the threads for potentially dead NAPIs around... IDK, just doesn't feel very clean.
