diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2010-09-07 23:19:35 -0700 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2010-09-09 17:06:34 +0900 |
| commit | bec38dd6ae9bde528d8723b9e88024e121424ae4 (patch) | |
| tree | 7da81eaa3108fee02caa65aba262bbf62e5d8846 /kexec | |
| parent | ed7780a5022bb4a9b9a23de1bda99c6de9921195 (diff) | |
x86 bzImage: Optimize the panic kernel memory layout.
Load the setup sectors above the kernel in the panic case,
to avoid wasting memory.
Linux kernels frequently have a severe alignment requirment
that can be as much as 16M. The start of the reserved
crash kernel region is 16M aligned. The setup sectors
are tiny 20k? and when we are not running the real mode code
they can live anywhere. Move the setup sectors from
lower address than the kernel to higher address than the kernel
avoids introducing a bad alignment. Allowing the linux kernel
to load lower. Loading the linux kernel lower in memory ensures
memory is used more efficiently.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'kexec')
| -rw-r--r-- | kexec/arch/i386/kexec-bzImage.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kexec/arch/i386/kexec-bzImage.c b/kexec/arch/i386/kexec-bzImage.c index ae18689..83d3a69 100644 --- a/kexec/arch/i386/kexec-bzImage.c +++ b/kexec/arch/i386/kexec-bzImage.c @@ -1,7 +1,7 @@ /* * kexec: Linux boots Linux * - * Copyright (C) 2003-2005 Eric Biederman (ebiederm@xmission.com) + * Copyright (C) 2003-2010 Eric Biederman (ebiederm@xmission.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -217,7 +217,7 @@ int do_bzImage_load(struct kexec_info *info, * anywhere as we will be just reading command line. */ setup_base = add_buffer(info, real_mode, setup_size, setup_size, - 16, 0x3000, -1, 1); + 16, 0x3000, -1, -1); } else if (real_mode->protocol_version >= 0x0200) { /* Careful setup_base must be greater than 8K */ |