This is a note to let you know that I've just added the patch titled
xen/setup: Fix for incorrect xen_extra_mem_start
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xen-setup-fix-for-incorrect-xen_extra_mem_start.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 0f16d0dfcdb5aab97d9e368f008b070b5b3ec6d3 Mon Sep 17 00:00:00 2001
From: Daniel Kiper <[email protected]>
Date: Wed, 11 May 2011 22:34:38 +0200
Subject: xen/setup: Fix for incorrect xen_extra_mem_start
initialization under 32-bit
From: Daniel Kiper <[email protected]>
commit 0f16d0dfcdb5aab97d9e368f008b070b5b3ec6d3 upstream.
git commit 24bdb0b62cc82120924762ae6bc85afc8c3f2b26 (xen: do not create
the extra e820 region at an addr lower than 4G) does not take into
account that ifdef CONFIG_X86_32 instead of e820_end_of_low_ram_pfn()
find_low_pfn_range() is called (both calls are from arch/x86/kernel/setup.c).
find_low_pfn_range() behaves correctly and does not require change in
xen_extra_mem_start initialization. Additionally, if xen_extra_mem_start
is initialized in the same way as ifdef CONFIG_X86_64 then memory hotplug
support for Xen balloon driver (under development) is broken.
Signed-off-by: Daniel Kiper <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/xen/setup.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -227,7 +227,11 @@ char * __init xen_memory_setup(void)
memcpy(map_raw, map, sizeof(map));
e820.nr_map = 0;
+#ifdef CONFIG_X86_32
+ xen_extra_mem_start = mem_end;
+#else
xen_extra_mem_start = max((1ULL << 32), mem_end);
+#endif
for (i = 0; i < memmap.nr_entries; i++) {
unsigned long long end;
Patches currently in stable-queue which might be from [email protected] are
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