Re: [Xen-devel] [PATCH v2 8/8] xen: arm: allocate more than one bank for 1:1 domain 0 if needed

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2014-06-18 at 10:10 +0100, Julien Grall wrote:
> 
> On 18/06/14 09:27, Ian Campbell wrote:
> > On Tue, 2014-06-17 at 18:58 +0100, Julien Grall wrote:
> >> Hi Ian,
> >>
> >> On 06/11/2014 05:40 PM, Ian Campbell wrote:
> >>> +    /*
> >>> +     * First try and allocate the largest thing we can as low as
> >>> +     * possible to be bank 0.
> >>> +     */
> >>> +    while ( order > min_low_order )
> >>> +    {
> >>> +        for ( bits = order ; bits < (lowmem ? 32 : PADDR_BITS); bits++ )
> >>> +        {
> >>> +            pg = alloc_domheap_pages(d, order, MEMF_bits(bits));
> >>> +            if ( pg != NULL )
> >>> +                goto got_bank0;
> >>> +        }
> >>> +        order--;
> >>> +    }
> >>> +
> >>> +    panic("Unable to allocate first memory bank");
> >>
> >> I gave a try to this patch in stand-alone on the versatile express and I
> >> hit this panic.
> >>
> >> Xen is trying to allocate 128Mb for the first bank. It was working
> >> without this patch.
> > 
> > What is your dom0_mem and how much ram does the system have?
> 
> I use the default value from Xen i.e 128MB. The platform has 1GB of RAM
> (see below Xen log with early printk enabled).

Thanks, how strange. Perhaps I got min_low_order wrong, or that loop is
knackered in some way. I'll check.



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