Re: [uml-devel] Re: UML patches against vanilla 2.6.0

[BlaisorBlade <blaisorblade_spam@yahoo.it>]

Alle 21:09, lunedì 29 dicembre 2003, Jason Lunz ha scritto:
> blaisorblade_spam@yahoo.it said:

> > I have some doubts about the 2.6 host-skas patch. I've searched through
> > the list for earlier ports to 2.6 and I've seen someone (Bryan O'Sullivan
> > <bos@serpentine.com>) complaining:
> >
> > "The big issue with the skas patches, though, appears to be that they
> > don't handle the UML kernel being killed, which results in the host
> > kernel's memory management being completely trashed."
> >
> > Is this a real issue or not?
>
> I think so. I'm running 2.6.0 vanilla + Ingo's combo -A2 on my host,
> with 2.4.23 UMLs.
> I tried to do something in the uml involving lots of
> tmpfs usage, and the host system crashed.

If you use the Ingo's combo patch, maybe it's not the Skas mode itself.

There is a change in mm/memory.c which is fine for UML, but IMHO probably
hurts for the host kernel. Looking at the patch he posts, however, he didn't 
use this change, so beyond the mm/memory.c problem there must be another one.

To test that, you can either select the changes to that file away from the 
patch, or unapply (with -R option to patch) this patch, which contains 
exactly that change:

http://web.tiscali.it/no-redirect-tiscali/blaisorblade/linux/archives/UML/v2/A-04-MM-compile-fix.patch

-- 
cat <<EOSIGN
Paolo Giarrusso, aka Blaisorblade
Linux Kernel 2.4.21/2.6.0-test on an i686; Linux registered user n. 292729
EOSIGN



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