Re: my simh-vax crashed: panic: pmap_enter on PG_SREF page

[Anders Magnusson <ragge%tethuvudet.se@localhost>]

    Den 2023-12-21 kl. 15:45, skrev Jason Thorpe:

> > On Dec 21, 2023, at 6:29 AM, Anders Magnusson <ragge%tethuvudet.se@localhost> wrote:
> >
> > Also, since SREF is set on the page, it means that a user process page is modified, and that information will now be lost.
> > Maybe this should be propagated upwards before removing the user process space?
> >       
> This should already happen as part of the natural flow, right?  I think the problem is avoided in the natural flow by making sure the user PTP mapping (in Sysmap) isn’t left twisting in the wind when a user PTP is put on the free list.
>
> 	https://www.netbsd.org/~thorpej/vax-pmap-tbi-ptps-patch.txt
>     
    Hm, you are fast providing patches :-)
    And yes, SREF should not be relevant here.
    
    The first two TBIS in your patch are OK.  The last one is not needed
    since the are followed by a TBIA when referenced :-)
    
    -- R