Revert f5d6a52f5111 ("x86/smpboot: Skip delays during SMP initialization similar to Xen")

Huang Ying reported x86 boot hangs due to this commit.

Turns out that the change, despite its changelog, does more
than just change timeouts: it also changes the way we
assert/deassert INIT via the APIC_DM_INIT IPI, in the x2apic
case it skips the deassert step.

This is historically fragile code and the patch did not
improve it, so revert these changes.

This commit:

  1a744cb356c5 ("x86/smp/boot: Remove 10ms delay from cpu_up() on modern processors")

independently removes the worst of the delays (the 10 msec delay).

The remaining delays can be addressed one by one, combined
with careful testing.

Reported-by: Huang Ying <[email protected]>
Cc: Anthony Liguori <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Gang Wei <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jan H. Schönherr <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tim Deegan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions