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

From: Ingo Molnar (mingo@chiara.csoma.elte.hu)
Date: Mon Jan 24 2000 - 15:28:06 EST


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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