On Mon, Sep 15, 2025 at 6:47 PM Jinchao Wang <wangjinchao...@gmail.com> wrote: > Should we support both modularization and changing the backend after > boot, so that the user has the choice?
Having both together and then being able to choose one or the other sounds like the ideal solution. An issue is that /proc/sys/kernel/nmi_watchdog is used to dynamically enable/disable both watchdogs and presumably renaming it for the buddy could cause issues in user code. There can be unexpected consequences of the buddy watchdog, as the NMI perf event goes away there can be extra cost in setting up the first event such as allocating buffers for the PMU. While enabling the NMI watchdog to avoid this cost is kind of odd, I think users would be glad of a workaround for what may be perceived as a regression. Thanks, Ian
