kexec/i386: allocate page table pages dynamically

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Impact: save .text size when kexec is built in but not loaded

This patch adds an architecture specific struct kimage_arch into
struct kimage. The pointers to page table pages used by kexec are
added to struct kimage_arch. The page tables pages are dynamically
allocated in machine_kexec_prepare instead of statically from BSS
segment. This will save up to 20k memory when kexec image is not
loaded.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Huang Ying 2008-10-31 09:48:08 +08:00 • committed by Ingo Molnar

parent 31498a0149

commit 92be3d6bdf

3 changed files with 64 additions and 21 deletions

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14

arch/x86/include/asm/kexec.h

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67

arch/x86/kernel/machine_kexec_32.c

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4

include/linux/kexec.h

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