This patch adds support for kdump, the kernel will reserve a region
for the crash kernel and jump there on panic.
Arch-specific functions are added to allow for implementing a crash
dump file interface, /proc/vmcore, which can be viewed as a ELF file.
A user space tool, like kexec-tools, is
This patch series to support kexec/kdump (only 64bit).
Kexec is a system call that enables you to load and boot into another kernel
from the currently running kernel. This is useful for kernel developers or
other people who need to reboot very quickly without waiting for the whole
BIOS boot
Add three new files, kexec.h, machine_kexec.c and relocate_kernel.S to the
LoongArch architecture that add support for the kexec re-boot mechanis
(CONFIG_KEXEC) on LoongArch platforms.
Supports loading vmlinux (vmlinux.elf) in ELF format and vmlinux.efi in
PE format.
I tested this on LoongArch
Defaults enable CONFIG_KEXEC to convenient kexec operations.
Signed-off-by: Youling Tang
---
arch/loongarch/configs/loongson3_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/loongarch/configs/loongson3_defconfig
b/arch/loongarch/configs/loongson3_defconfig
index
On Sun, Aug 28, 2022 at 6:56 PM Dave Young wrote:
>
> > John mentioned PANIC_ON().
>
> I would vote for PANIC_ON(), it sounds like a good idea, because
> BUG_ON() is not obvious and, PANIC_ON() can alert the code author that
> this will cause a kernel panic and one will be more careful before
>
Hi David,
On Sat, 27 Aug 2022 at 01:02, David Hildenbrand wrote:
>
> On 26.08.22 03:43, Dave Young wrote:
> > Hi David,
> >
> > [Added more people in cc]
> >
>
> Hi Dave,
>
> thanks for your input!
You are welcome :)
>
> [...]
>
> >> Side note: especially with kdump() I feel like we might see
On 08/25/22 at 10:48am, Mike Rapoport wrote:
..
> > > There were several rounds of discussion how to remap with base pages only
> > > the crash kernel area, the latest one here:
> > >
> > > https://lore.kernel.org/all/1656777473-73887-1-git-send-email-guanghuif...@linux.alibaba.com
> > >
>
