Re: [Xen-ia64-devel] Regression: [IA64] Saner dom0 memory and cp

On Wed, Aug 29, 2007 at 10:33:06PM -0700, Alex Williamson wrote:
> On Thu, 2007-08-30 at 13:17 +0800, Duan, Ronghui wrote:
> > I make a new domain0 kernel with CONFIG_IA64_DIG .It still panic.
> 
> > (XEN) Maximum permitted dom0 size: 3973MB
> 
>    It looks like we need to reduce dom0 memory by the size of the
> contiguous region the swiotlb makes.  By default, this is 64MB, so
> booting with dom0_mem=3909M will probably work (at least that's the
> difference on my 2G system).  Unfortunately the swiotlb can be resized
> by a command line option, so statically removing 64MB isn't a very good
> solution.  Perhaps we need a more efficient create_contiguous_region()?
> I'm still not sure why Simon's 2G system requires such a low memory
> parameter though, mine boots w/ dom0_mem=1870 (exactly 64M off from the
> printed maximum of 1934).

Hi Alex,

the dom0_mem=N-64 trick does fix the problem on the 2G tiger2 box that I
have access too, but not the RX2620. Both machines are running with the
same config, which I posted previously. Perhaps the RX2620 problem has
to do with the layout of the physical memory regions?

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/


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