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Youling Tang
f70b14a370
Enabling crash dump (kdump) includes: - Prepare contents of ELF header of a core dump file, /proc/vmcore, using crash_prepare_elf64_headers(). - Add "mem=size@start" parameter to the command line and pass it to the capture kernel. Limit the runtime memory area of the captured kernel to avoid disrupting the production kernel's runtime state. - Add "elfcorehdr=size@start" parameter to the cmdline. The basic usage for kdump (add the cmdline parameter crashkernel=512M to grub.cfg for production kernel): 1) Load capture kernel image (vmlinux.efi or vmlinux can both be used): # kexec -s -p vmlinuz.efi --initrd=initrd.img --reuse-cmdline 2) Do something to crash, like: # echo c > /proc/sysrq-trigger Signed-off-by: Youling Tang <tangyouling@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.