On 3/5/2024 12:57 AM, Max Boone wrote: > On Tue Mar 5, 2024 at 12:32 AM UTC, Joel Fernandes wrote: >> FWIW, I use a Windows machine that has WSL2 (kernel version >> 5.15.133.1-microsoft-standard-WSL2) and I have never experienced any kind of >> hang. Though, this is a desktop and not a laptop or battery powered device. > > Is that also an ARM64 machine, because I have never seen this happen on > a x86_64 machine, there it runs like a charm. Out of curiousity, if you are > running an ARM64 Desktop. If I may as, which one, as the Volterra Development > Kit is not available in the Netherlands. It is x86 for me. >> Also this github thread looks awfully similar to the github thread you pointed >> and has the same clear_rseq signature leading to the RCU stall. Over there also >> it is a hang, but they say the CPU usage is at 100%: >> https://github.com/microsoft/WSL/issues/8529 > > Indeed, when the RCU stalls occur, the CPU of the core that is stalling > ramps up to 100%. I had thought that was an effect of the stall, but > will check if the 100% usage is caused by the process that is stalling. Right. And, RCU needs CPU available for its smooth operation (for RCU kthreads, interrupt handling, softirq etc.). So a CPU pegged at 100% for long period of time is not ideal and in your case likely causes the stall. - Joel
