RE: [Xen-ia64-devel] Regression: [IA64] Saner dom0 memory and cpudefaults

[Alex Williamson <alex.williamson@xxxxxx>]

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).

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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