[patch] smp-2.3.41-A1, (was: Re: BUG? i386 TLB Flushing)

[Ingo Molnar]

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On Mon, 24 Jan 2000, Stephen C. Tweedie wrote:

> > yeah, this is indeed a bug and it also explains the one remaining 64GB
> > mystery: the extra invlpg in highmem.c. Patch (with other SMP fixes) will
> > follow shortly.
> 
> I was really, really hoping that this might lay to rest the boot
> failures with PAE36 for me, but no such luck --- 2.3.40 still dies with
> SIGSEGV in init.  Zach Brown can reproduce the same thing on one of his
> boxes: Zach, does 2.3.40 do anything to help things for you?

ok, how about the attached smp-2.3.41-A1 patch:

	- fixes dumb cr4 flushing typo found by Manfred

	- (tries to fix) current->active_mm == NULL problem by moving the
	  setting of prev->active_mm to after the switch_to(). It happens
	  before has_cpu is set to 0, so it should be safe. It also cannot
	  open up a window to TLB corruption i believe.

-- mingo

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