Re: [Xen-devel] 'Sloppier' PCI access checks in main tree

[Stijn De Weirdt <stijn.deweirdt@xxxxxxxxx>]

sorry missed this email.
i'm using 2.4.28. i'll try today, since i have to recompile my kernel
anyway. reaction times on my system are anything but good (what
performace loss should i expect if i use a file-backed vbd (and what
fs is the most for those). also network seems pretty slow.

stijn


On Sat, 8 Jan 2005 18:42:16 -0000, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> wrote:
> Stijn,
> 
> What kernel are you using? We've all been working on the assumption that
> you were using 2.6, but the problem your seeing would be consistent with
> using 2.4, which only has support for basic X servers. If you are using
> 2.4 try disabling the int10/bios/vesa X drivers etc.
> 
> [Our /dev/mem under 2.4 doesn't support read/write only mmap.]
> 
> Ian
> 
> > -----Original Message-----
> > From: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
> > [mailto:xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
> > Keir Fraser
> > Sent: 08 January 2005 17:22
> > To: Ronald G. Minnich
> > Cc: Stijn De Weirdt; xen-devel@xxxxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-devel] 'Sloppier' PCI access checks in main tree
> >
> > > As I read this, the module loader tried to run the vga bios
> > and failed, as
> > > it could not get to the actual BIOS code? That's how it looks to me
> > > anyway.
> > >
> > > I have no idea: has anyone seen option rom access working
> > under Xen? I
> > > have not, but I have not tried this recently. The VGA bios
> > ROM is not
> > > accessible on my laptop, however.
> > >
> > > Does Xen currently allow a guest to set enable the option
> > rom access and
> > > set the register (0x30 I think) for the option ram base address?
> >
> > I've just checked in sloppoer PCI checking for 2.0-testing and
> > unstable trees. It should help for those drivers that need to monkey
> > with the base-address config registers (we had previously been
> > disallowing that). Really, applying any check finer-grained than
> > "should this domain be allowed to access this device?" is hard as
> > various drivers need to do all kinds of weird things with the
> > config-register space.
> >
> > Hopefully this may help you get further in getting AGP to work on your
> > system!
> >
> >  -- Keir
> >
> > 
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>


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