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

[WANG Chao]

On 04/11/14 at 10:06am, Dave Young wrote:
> 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.
> > 
> > Any comment is appreciate!
> > 
> > v5->v4:
> > Dave:
> >  - separate add_setup_data() to another patch
> > Vivek:
> >  - adding comments for setup_data
> >  - store crash memory range info golobally in kexec_info
> > 
> > v3->v4:
> > Linn: check return value of malloc (use xmalloc).
> > me: fix dbgprintf_mem_range.
> > 
> > v2->v3:
> > Linn:
> >  - do not free sd (setup_data) buffer.
> >  - reuse code in setup_e820 and setup_e820_ext.
> > 
> > v1->v2:
> > Vivek:
> >  - Use function instead of macro for dbgprint_mem_range
> >  - Do not pass reserved memory range for kdump. It could addressed later
> >    separately.
> > 
> > WANG Chao (10):
> >   x86, cleanup: fix indent
> >   x86, cleanup: add extra arguments to add_memmap() and delete_memmap()
> >   x86, cleanup: add other types of memory range for 2nd kernel boot to
> >     memmap_p
> >   x86, cleanup: add_memmap() only do alignment check on RANGE_RAM
> >   x86, cleanup: use dbgprint_mem_range for memory range debugging
> >   x86, cleanup: increase CRASH_MAX_MEMMAP_NR up to
> >     CRASH_MAX_MEMORY_RANGES
> >   x86, cleanup: Store crash memory ranges kexec_info
> >   x86, cleanup: Add a funtion add_setup_data()
> >   x86: add --pass-memmap-cmdline option
> >   x86: Pass memory range via E820 for kdump
> > 
> >  kexec/arch/i386/crashdump-x86.c        |  79 +++++++--------
> >  kexec/arch/i386/crashdump-x86.h        |   2 +-
> >  kexec/arch/i386/include/arch/options.h |   2 +
> >  kexec/arch/i386/kexec-x86.c            |   4 +
> >  kexec/arch/i386/kexec-x86.h            |   1 +
> >  kexec/arch/i386/x86-linux-setup.c      | 175 ++++++++++++++++++++++-----------
> >  kexec/arch/i386/x86-linux-setup.h      |   1 +
> >  kexec/arch/x86_64/kexec-x86_64.c       |   5 +
> >  kexec/kexec.h                          |   2 +
> >  9 files changed, 171 insertions(+), 100 deletions(-)
> 
> Hi,
> 
> Here is what I received, seems there's some duplicate patches?

Sorry, I rearranged some patches and forget to remove the old one.

I'll resend. Thanks for noticing me.

Thanks
WANG Chao