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x86: make crashdump works

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1. KERNEL_CRASH_DUMP should depends on KERNEL_PROC_KCORE (kexec use it)
2. select crashkernel mem size by totalmem
   mem <= 256M disable crashkernel by default
   mem >= 4G use 256M for crashkernel
   mem >= 8G use 512M for crashkernel
   default use 128M
3. set BOOT_IMAGE in kdump.init
4. resolve a "Unhandled rela relocation: R_X86_64_PLT32" error

Tested on x86_64

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
This commit is contained in:
Chen Minqiang
2019-07-11 22:34:03 +08:00
committed by Daniel Golle
parent ecef29b294
commit ec5e8461c1
4 changed files with 33 additions and 1 deletions
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4
config/Config-kernel.in
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@@ -477,10 +477,14 @@ config KERNEL_KEXEC
config KERNEL_PROC_VMCORE
bool
config KERNEL_PROC_KCORE
bool
config KERNEL_CRASH_DUMP
depends on i386 || x86_64 || arm || armeb
select KERNEL_KEXEC
select KERNEL_PROC_VMCORE
select KERNEL_PROC_KCORE
bool "Enable support for kexec crashdump"
default y