[Crash-utility] [RFC PATCH v2 0/2] Show memory overcommit data in dump_kmeminfo()

[Brad Hubbard]

On 12/02/2014 02:16 AM, Aaron Tomlin wrote:
> The first patch changes dump_kmeminfo() to report overcommit information
> similar to that displayed under the proc/meminfo file. It may be useful to
> indicate memory over commitment abuse, for example with forced vmcores from
> system hangs due to shortage of memory. The intended output is as follows:
>
>    crash> kmem -i
>                     PAGES        TOTAL      PERCENTAGE
>        TOTAL MEM  1965332       7.5 GB         ----
>             FREE    78080       305 MB    3% of TOTAL MEM
>             USED  1887252       7.2 GB   96% of TOTAL MEM
>           SHARED   789954         3 GB   40% of TOTAL MEM
>          BUFFERS   110606     432.1 MB    5% of TOTAL MEM
>           CACHED  1212645       4.6 GB   61% of TOTAL MEM
>             SLAB   146563     572.5 MB    7% of TOTAL MEM
>
>       TOTAL SWAP  1970175       7.5 GB         ----
>        SWAP USED        5        20 KB    0% of TOTAL SWAP
>        SWAP FREE  1970170       7.5 GB   99% of TOTAL SWAP
>
>     COMMIT LIMIT  2952841      11.3 GB         ----
>        COMMITTED  1150595       4.4 GB   38% of TOTAL LIMIT
>
> The second patch simply removes the mention of dump_zone_page_usage()
> availability from kmem's help page.
>
> Tested under 3.16.4-200.fc20.x86_64 only.
> Though this should work under RHEL5 (2.6.18) and above.
>
> Aaron Tomlin (2):
>    kmem: Show memory commitment data in kmem output
>    help: Remove mention of dump_zone_page_usage()
>
>   help.c   |  40 ++++++++---------
>   memory.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------
>   2 files changed, 155 insertions(+), 38 deletions(-)
>

Nice work man.

Looking forward to using this in the future.

-- 


Kindest Regards,

Brad Hubbard
Senior Software Maintenance Engineer
Red Hat Global Support Services
Asia Pacific Region