On Fri, Dec 29, 2017 at 3:15 PM, Alexander Tsoy alexander@tsoy.me wrote:
В Пт, 29/12/2017 в 14:09 -0800, Linus Torvalds пишет:
What happens if you take a failing kernel, and then in arch/x86/kernel/traps.c do_double_fault(), you change the
#ifdef CONFIG_X86_ESPFIX64
to just a
#if 0
do you then get an actual double-fault oops report instead of the stall (and NMI oops)?
This is what I get after disabling ESPFIX64 (see attachment).
Ok, looks like it made no difference for you or for Toralf.
So that was a waste of time. Damn. Also very strange how there's that double fault in the call trace, but no actual output from any double fault. Without the ESPFIX64 code, I don't see how that happens, but since I have no idea what is going on here, I'm obviously missing a lot.
Hopefully somebody else has a clue or sees something I'm missing.
Linus