[Makedumpfile PATCH V2 0/4] x86_64: Fix page_offset for randomized base enabled

[Dave Young]

Pratyush, the patches works for me, thanks~

On 10/31/16 at 01:47pm, Pratyush Anand wrote:
> Patch 1/4 fixes page_offset calculation, so that it is correctly calculated
> on KASLR enabled kernel as well.
> Patch 2/4 simplifies VA to PA translation. New code has been benchmarked
> against old code on a 4T system.
> Patch 3/4 and 4/4 is removal of (now) unnecessary code.
> 
> I think, we should find a way to kill find_vememmap() as well, so that
> VMEMMAP_START can be removed. I have very limited idea about x86, so unable
> to do that as of now.

It was introduced in below commit, ccing Cliff Wickman, see if he has
thoughts.

commit 46176a97f329904c10d4efe5582594d55a04339c
Author: Cliff Wickman <cpw at sgi.com>
Date:   Mon Oct 26 23:20:18 2015 +0900

> 
> Changes since V1:
> * A bug in patch 1/4 fixed
> * Patch log of 2/4 improved to include more number of trials
> 
> Pratyush Anand (4):
>   x86_64: Calculate page_offset from pt_load
>   x86_64: translate all VA to PA using page table values
>   x86_64: kill is_vmalloc_addr_x86_64()
>   x86_64: kill some unused initialization
> 
>  arch/x86_64.c  | 84 ++++++++++++++++++++--------------------------------------
>  makedumpfile.h |  9 +++----
>  2 files changed, 32 insertions(+), 61 deletions(-)
> 
> -- 
> 2.7.4
> 
> 
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