[PATCH v4 1/3] kexec: Move vmcoreinfo out of the kernel's .bss section

Juergen Gross jgross at suse.com
Thu Apr 20 07:24:41 PDT 2017

On 20/04/17 13:39, Xunlei Pang wrote:
> As Eric said,
> "what we need to do is move the variable vmcoreinfo_note out
> of the kernel's .bss section.  And modify the code to regenerate
> and keep this information in something like the control page.
> Definitely something like this needs a page all to itself, and ideally
> far away from any other kernel data structures.  I clearly was not
> watching closely the data someone decided to keep this silly thing
> in the kernel's .bss section."
> This patch allocates extra pages for these vmcoreinfo_XXX variables,
> one advantage is that it enhances some safety of vmcoreinfo, because
> vmcoreinfo now is kept far away from other kernel data structures.
> Suggested-by: Eric Biederman <ebiederm at xmission.com>
> Cc: Michael Holzheu <holzheu at linux.vnet.ibm.com>
> Cc: Juergen Gross <jgross at suse.com>
> Signed-off-by: Xunlei Pang <xlpang at redhat.com>

Xen parts: Reviewed-by: Juergen Gross <jgross at suse.com>


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