On Thu, Mar 13, 2025, at 9:35 AM, Rafael J. Wysocki wrote: > On Thu, Mar 13, 2025 at 5:12 AM Chris Murphy <chris@xxxxxxxxxxxxxxxxx> wrote: >> >> Four kacpi_notify kernel threads are continuously using CPU, makes the laptop warm, >> fans run continuosly. This is a Fedora debug kernel, it's not intended for production. >> But I'm wondering if this performance hit is expected and if it's worth it (for kernel developers). > > No and no. Is it a firmware or kernel bug? Any other info I should provide? I updated the firmware to the latest firmware, but the behavior is unchanged. I'm not sure what kernel config might be responsible for this, so I'm not sure what to suggest to the kernel team to make the performance hit go away. > kacpi_notify is only used for Notify() processing which only happens > when there are events signaled by the platform firmware. Like battery > or thermal events, for example. It seems to happen more often than not, happens with AC power connected or not. -- Chris
