Re: Buggy IPI and MTRR code on low memory

[Steven Rostedt]

On Wed, 28 Jan 2009, Peter Zijlstra wrote:

> On Wed, 2009-01-28 at 11:38 -0500, Steven Rostedt wrote:
> 
> > The problem is that if we use the stack, then we must wait for the 
> > function to finish. But in the mtrr code, the called functions are waiting 
> > for the caller to do something after the smp_call_function. Thus we 
> > deadlock!
> 
> You'd have to 'fix' the regular fallback paths to use your scheme as
> well.

Not sure what you mean by that. I booted just fine with the patch, and 
forcing data to NULL. Although, I'm not saying that these should not be 
fixed.

-- Steve

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