[PATCH v5 00/10] kexec-tools, x86: E820 memmap pass for kdump

WANG Chao chaowang at redhat.com
Thu Apr 10 20:05:19 PDT 2014


On 04/10/14 at 05:12pm, WANG Chao wrote:
> Hi, all
> 
> (Sorry for this late update. I was occupied with something else)
> 
> This patchset enables passing memory map via E820 map on x86 platform instead
> of memmap=exactmap. It's a better design and will solve the following problem
> so far:
> 
> - kernel cmdline is limited resource and large machines tend to have many
>   memory ranges that may excceed kernel cmdline limit size.
> - kASLR doesn't work with memmap=exactmap, because kASLR happens early than
>   user defined memmap=exactmap takes effect.
> 
> Unfortunately, saved_max_pfn still got its user out there (calgry pci, it looks
> like the only one). So for backward compatibility, I'm introducing a new option
> --pass-memmap-cmdline to force kexec-tools to pass memmap=exactmap, the old way.
> 
> This patchset contains massive updates from the previous one. I take some
> suggestions from reviewers. I try to split the changes into smaller pieces and
> keep the whole change as minimal as I can so it wouldn't be too harsh to review
> the patch.

I messed up this patchset and ended up with some duplicated patches :(

Please ignore this patchset and take a look at the other series I just
sent out with "RESEND" suject prefix.

Thanks
WANG Chao



More information about the kexec mailing list