On Wed, Mar 19, 2025 at 11:47:32AM +0100, Mateusz Guzik wrote: ... > Is not this going a little too far? > > the lock + irq trip is quite expensive in its own right and now is > going to be paid for each cpu, as in the total time spent executing > cgroup_rstat_flush_locked is going to go up. Lock/unlock when the cacheline is already on the cpu is pretty cheap and on modern x86 cpus at least irq on/off are also only a few cycles, so you probably wouldn't be able to tell the difference. Thanks. -- tejun
