[Crash-utility] [PATCH 0/5] new options for memory debug commands

[Dave Anderson]

Hello Yu,

I am going to defer the review/testing of this patchset until after crash-7.1.0
has been released, which I hopefully will get done tomorrow. 

Thanks,
  Dave


----- Original Message -----
> search:
>   -f struct-page.flags-mask
> 	When searching kernel memory, crash walks through all identity
> 	mapping space which includes all physical memory. Nowadays we
> 	have machines that equipped with more than 256G memory, it takes
> 	a long time to go through all pages, especially most of them
> 	are used by user space programs (e.g. LRU pages). This option
> 	allows us to skip pages with certain struct page flags.
>   -g
> 	Allow us to skip whole compound pages instead of only skipping
> 	head pages when using -f, because some flags are only set to
> 	head pages which tails pages share same properties with their
> 	head pages.
> 
> kmem:
>   -k
> 	Verify compound page order. Useful when debugging memory leak
> 	caused by freeing compound pages with wrong order.
> 
>   -r
> 	Only print used pages (i.e. the page count is not zero). Makes
> 	the output smaller (and faster to grep/vim/emacs).
> 
> Yu Zhao (5):
>   memory: better compound page support
>   memory: struct page.flags based filter
>   memory: skip compound pages when using search filter
>   memory: display and verify compound page order
>   memory: kmem option to skip free pages
> 
>  defs.h   |   4 +
>  help.c   |  24 +++-
>  memory.c | 418
>  ++++++++++++++++++++++++++++++++++++++++++++++++---------------
>  3 files changed, 345 insertions(+), 101 deletions(-)
> 
> --
> 2.2.0.rc0.207.ga3a616c
> 
>