Hello, On 03/11/2020 07:31, yaoaili126@xxxxxxx wrote: > From: Aili Yao <yaoaili@xxxxxxxxxxxx> > > Hi! Thanks for your reply. > Got you! > And for x86 platform, NMI is not only for hw errors, it does have some other > functions like watchdog, and maybe others i don't know. > when CPU is in heavy workload, the NMI watchdog will be triggered > repeatily, and it will come to ghes_notify_nmi, the atomic raw_spin_lock > may lock the memory bus which may have little performance inpact to other > coresi i think. > I think you may modify it. But the atomic property is needed. Without it, according to the commit that added that code, CPUs serialise in the GHES code. Thanks, James
