[PATCH v4 1/5] crash: move crashkernel parsing and vmcore related code under CONFIG_CRASH_CORE
Dave Young
dyoung at redhat.com
Thu Jan 5 18:02:03 PST 2017
Hi Hari
Thanks for the update.
On 01/05/17 at 10:59pm, Hari Bathini wrote:
> Traditionally, kdump is used to save vmcore in case of a crash. Some
> architectures like powerpc can save vmcore using architecture specific
> support instead of kexec/kdump mechanism. Such architecture specific
> support also needs to reserve memory, to be used by dump capture kernel.
> crashkernel parameter can be a reused, for memory reservation, by such
> architecture specific infrastructure.
>
> But currently, code related to vmcoreinfo and parsing of crashkernel
> parameter is built under CONFIG_KEXEC_CORE. This patch introduces
> CONFIG_CRASH_CORE and moves the above mentioned code under this config,
> allowing code reuse without dependency on CONFIG_KEXEC. There is no
> functional change with this patch.
>
> Signed-off-by: Hari Bathini <hbathini at linux.vnet.ibm.com>
> ---
>
> Changes from v3:
> * Renamed log_buf_kexec_setup()to log_buf_vmcoreinfo_setup() instead of
> log_buf_crash_setup().
>
> Changes from v2:
> * Used CONFIG_CRASH_CORE instead of CONFIG_KEXEC_CORE at
> appropriate places in printk and ksysfs.
>
>
> arch/Kconfig | 4
> include/linux/crash_core.h | 65 ++++++
> include/linux/kexec.h | 57 ------
> include/linux/printk.h | 4
> kernel/Makefile | 1
> kernel/crash_core.c | 445 ++++++++++++++++++++++++++++++++++++++++++++
> kernel/kexec_core.c | 404 ----------------------------------------
> kernel/ksysfs.c | 8 +
> kernel/printk/printk.c | 6 -
> 9 files changed, 531 insertions(+), 463 deletions(-)
> create mode 100644 include/linux/crash_core.h
> create mode 100644 kernel/crash_core.c
>
[snip]
Acked-by: Dave Young <dyoung at redhat.com>
Thanks
Dave
More information about the kexec
mailing list