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xen-devel
[Xen-devel] [PATCH 4/4] xen: do not create the extra e820 region at an a
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linux-kernel@xxxxxxxxxxxxxxx |
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Subject: |
[Xen-devel] [PATCH 4/4] xen: do not create the extra e820 region at an addr lower than 4G |
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From: |
stefano.stabellini@xxxxxxxxxxxxx |
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Date: |
Tue, 12 Apr 2011 12:19:52 +0100 |
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jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, Stefano.Stabellini@xxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, mingo@xxxxxxx, hpa@xxxxxxxxxxxxxxx, yinghai@xxxxxxxxxx, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> |
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Tue, 12 Apr 2011 04:27:17 -0700 |
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From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
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.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
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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