On Tue, 9 Jan 2018, Peter Zijlstra wrote: > > I'll try your patch and see if it makes a difference. > > I suspect not, it shouldn't be PTI specific.
yes, applying your patch didn't help, still locks up on the Haswell machine. Is there any debugging I could turn on that would help? I tried KASAN but it didn't help. I think I have the regular lockdep stuff enabled. alt-sysrq doesn't work either (or at least, the version using BREAK over the serial console doesn't, I can maybe try hooking up a keyboard/display to see if that helps). Vince
