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    SubjectRe: [PATCH 4/4] xen: do not create the extra e820 region at an addr lower than 4G
    On Tue, Apr 12, 2011 at 12:19:52PM +0100, stefano.stabellini@eu.citrix.com wrote:
    > From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
    >
    > Do not add the extra e820 region at a physical address lower than 4G
    > because it breaks e820_end_of_low_ram_pfn().
    >
    > It is OK for us to move the xen_extra_mem_start up and down because this
    > is the index of the memory that can be ballooned in/out - it is memory
    > not available to the kernel during bootup.

    OK. Stuck it on rc3 queue.

    >
    > Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
    > ---
    > arch/x86/xen/setup.c | 2 +-
    > 1 files changed, 1 insertions(+), 1 deletions(-)
    >
    > diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
    > index 9c38bd1..a51e010 100644
    > --- a/arch/x86/xen/setup.c
    > +++ b/arch/x86/xen/setup.c
    > @@ -229,7 +229,7 @@ char * __init xen_memory_setup(void)
    >
    > memcpy(map_raw, map, sizeof(map));
    > e820.nr_map = 0;
    > - xen_extra_mem_start = mem_end;
    > + xen_extra_mem_start = max((1ULL << 32), mem_end);
    > for (i = 0; i < memmap.nr_entries; i++) {
    > unsigned long long end;
    >
    > --
    > 1.7.2.3


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