[PATCH 2/2] makedumpfile: Clean up unused KERNEL_IMAGE_SIZE
Baoquan He
bhe at redhat.com
Tue Nov 8 16:16:50 PST 2016
On 11/08/16 at 09:26am, Dave Anderson wrote:
>
>
> ----- Original Message -----
> > The old MODULES_VADDR need be decided by KERNEL_IMAGE_SIZE when kaslr
> > enabled. Now MODULES_VADDR is not needed any more since Pratyush makes
> > all VA to PA converting done by page table lookup. So remove its related
> > code.
>
> Hi Bao,
>
> I'm not clear on this. The crash utility still reads/needs KERNEL_IMAGE_SIZE
> from the dumpfile's vmcoreinfo data. Is it being written to the vmcoreinfo
> section somewhere else in the code?
Aha, seems makedumpfile will get the vmcoreinfo offset and size, then
write the whole vmcoreinfo block into dumped vmcore header. But if
specify '-g' for makedumpfile to only generate a vmcoreinfo file, it
won't contain KERNEL_IMAGE_SIZE.
makedumpfile -g vmcoreinfo -x vmlinux
So I am not sure if you care about vmcoreinfo file, but you are right, I
should not remove the vmcoreinfo reading and writing data.
Thanks for pointing it out, will send v2 post.
Thanks
Baoquan
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