Re: Solving the last piece of the uvm_pageqlock problem

[Andrew Doran <ad%netbsd.org@localhost>]

On Wed, Dec 25, 2019 at 03:02:41AM +0100, Joerg Sonnenberger wrote:
> On Tue, Dec 24, 2019 at 10:08:01PM +0000, Andrew Doran wrote:
> > This is a diff against a tree containing the allocator patch I posted
> > previously:
> > 
> > 	http://www.netbsd.org/~ad/2019/pdpol.diff
> 
> I wanted to give this a spin before travelling, but it doesn't survive
> very long here. I get NULL pointer derefs in
> uvmpdpol_pageactivate_locked, coming from uvmpdpool_pageintent_realize.
> That's within seconds of the scan phase of a bulk build.

I had a look and I think I can see why.  I'll come back with another diff
soon.  Thank you for you for trying it Joerg, und Froehliche Weihnachten.

Andrew