diff options
| author | Magnus Damm <magnus@valinux.co.jp> | 2006-09-26 10:52:38 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:38 +0200 |
| commit | 3566561bfadffcb5dbc85d576be80c0dbf2cccc9 (patch) | |
| tree | eaafaf68156f9f2f1a2af8a7ffed95653fea8aa5 /arch/x86_64/kernel/setup64.c | |
| parent | 4bfaaef01a1badb9e8ffb0c0a37cd2379008d21f (diff) | |
[PATCH] i386: Avoid overwriting the current pgd (V4, i386)
kexec: Avoid overwriting the current pgd (V4, i386)
This patch upgrades the i386-specific kexec code to avoid overwriting the
current pgd. Overwriting the current pgd is bad when CONFIG_CRASH_DUMP is used
to start a secondary kernel that dumps the memory of the previous kernel.
The code introduces a new set of page tables. These tables are used to provide
an executable identity mapping without overwriting the current pgd.
Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/kernel/setup64.c')
0 files changed, 0 insertions, 0 deletions