On 2016-11-08 10:23:02 [+0100], Borislav Petkov wrote: > On Mon, Nov 07, 2016 at 09:12:24PM +0100, Borislav Petkov wrote: > > On Mon, Nov 07, 2016 at 10:55:24AM -0800, Luck, Tony wrote: > > > I don't think that helps as much as you'd like it to help (at > > > least on Intel). A broadcast machine check that finds the boot > > > CPU has set CR4[MCE]=1 is still going to end up in reset if any > > > other CPU still has CR4[MCE]=0 > > > > By leaving/moving the setting of CR4 earlier on all cores, we'll > > at least make the possible window for such potential resets a lot > > smaller... > > ... and in general, I'm still unsure about *why* we need this change for > hotplug. bigeasy, can you please clarify first?
I want to get rid of non-symmetrical part and the arch hook which should be part of the hp notifier itself. I wouldn't be too much afraid about the when point in time when the notifier runs: It is the *first* notifier that will be invoked on the target CPU. This is only a few lines after the old hook. Nothing else long delaying should be invoked. > Thanks. Sebastian
