On Mon, Mar 30, 2009 at 06:54:51PM +0100, Eric B Munson wrote:
> Sorry for the resend, earlier patch did not include sample output.
>
> Add a switch to hugeadm that asks for a general report of huge page
> availablity on the system. It combines the output of the
> --list-all-mounts and --pool-list switches with a list of huge page
> sizes with configured pools. It will also let the user know if there
> is no swap configured that pool resizing is likely to fail.
>
> Here are some sample outputs:
>
> First, no configured mounts:
> emun...@lappy-486:~$ hugeadm --explain
> No hugetlbfs mount point found.
>
> Huge page pools:
> Size Minimum Current Maximum Default
> 4194304 0 0 0 *
>
> Huge page sizes with configured pools:
> emun...@lappy-486:~$
>
> Second, configured mount with pages available:
> emun...@lappy-486:~$ hugeadm --explain
> Mount Point Options
> /var/lib/hugetlbfs/global/pagesize-4194304 rw,pagesize=4194304
>
> Huge page pools:
> Size Minimum Current Maximum Default
> 4194304 30 30 30 *
>
> Huge page sizes with configured pools:
> 4194304
> emun...@lappy-486:~$
>
> Last, no swap available:
> emun...@lappy-486:~$ hugeadm --explain
> Mount Point Options
> /var/lib/hugetlbfs/global/pagesize-4194304 rw,pagesize=4194304
>
> Huge page pools:
> Size Minimum Current Maximum Default
> 4194304 30 30 30 *
>
> Huge page sizes with configured pools:
> 4194304
> hugeadm: WARNING: Swap is full or no swap space configured, resizing pool may
> fail.
> emun...@lappy-486:~$
>
> Signed-off-by: Eric B Munson <ebmun...@us.ibm.com>
> ---
> hugeadm.c | 20 ++++++++++++++++++++
> 1 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/hugeadm.c b/hugeadm.c
> index 2e99b44..9742323 100644
> --- a/hugeadm.c
> +++ b/hugeadm.c
> @@ -98,6 +98,9 @@ void print_usage()
> CONT("the specified options would have done without");
> CONT("taking any action");
>
> + OPTION("--explain", "Gives a overview of the status of the system");
> + CONT("with respect to huge page availability");
> +
> OPTION("--help, -h", "Prints this message");
> }
>
> @@ -125,6 +128,8 @@ int opt_hard = 0;
> #define LONG_CREATE_GLOBAL_MOUNTS (LONG_MOUNTS|'G')
> #define LONG_LIST_ALL_MOUNTS (LONG_MOUNTS|'A')
>
> +#define LONG_EXPLAIN ('e' << 8)
> +
> #define MAX_POOLS 32
>
> static int cmpsizes(const void *p1, const void *p2)
> @@ -606,6 +611,16 @@ void page_sizes(int all)
> }
> }
>
> +void explain()
> +{
> + mounts_list_all();
> + printf("\nHuge page pools:\n");
> + pool_list();
> + printf("\nHuge page sizes with configured pools:\n");
> + page_sizes(0);
> + check_swap();
> +}
> +
> int main(int argc, char** argv)
> {
> int ops;
> @@ -631,6 +646,7 @@ int main(int argc, char** argv)
> {"page-sizes", no_argument, NULL, LONG_PAGE_SIZES},
> {"page-sizes-all", no_argument, NULL, LONG_PAGE_AVAIL},
> {"dry-run", no_argument, NULL, 'd'},
> + {"explain", no_argument, NULL, LONG_EXPLAIN},
>
> {0},
> };
> @@ -721,6 +737,10 @@ int main(int argc, char** argv)
> page_sizes(1);
> break;
>
> + case LONG_EXPLAIN:
> + explain();
> + break;
> +
> default:
> WARNING("unparsed option %08x\n", ret);
> ret = -1;
Acked-by: Mel Gorman <m...@csn.ul.ie>
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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