Ken Moffat wrote:
One of the recent items in the kernel (new for 4.14) is the ORC
stack unwinder, intended to get more accurate traces when a kernel
dumps - so that people can work out what went wrong.
It won't be the default for some time, but I'm trying it on my
4.14-rc kernel builds. And now I've got to the end of LFS and
failed to build the kernel, because this needs libelf :
Makefile:937: *** "Cannot generate ORC metadata for CONFIG_ORC_UNWINDER=y, please
install libelf-dev, libelf-devel or elfutils-libelf-devel". Stop.
For as long as this is not the default, it will be like a lot of
other things and only in BLFS. But if it does become part of the
default x86 config we will have to move it into LFS.
It sounds like something for kernel developers. I cannot recall any
kernel panics or other failures except occasionally when booting without
the needed drivers.
I wonder if it would ever be set as the default and even if it is, it
would be easier to just make a note that it should be disabled.
Of course, experienced lfsers would have no problem adding it via chroot.
-- Bruce
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