Allow resize of specific pools via the --pool-minimum-adjust and
--pool-maximum-adjust commands. The first affects the number of static
pages in the pool, the second affects the number of overcommit pages
for the pool. These are exposed as lower and upper bound on the pool
to match the display in --pool-list. Adjustments are either absolute,
or relative with a + or - prefix. For exmaple the following incantion
increases the 2MB page pool minimum by 10 pages.
--pool-minimum-adjust 2048kb:+10
Signed-off-by: Andy Whitcroft <[EMAIL PROTECTED]>
---
hpoolcfg.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 84 insertions(+), 2 deletions(-)
diff --git a/hpoolcfg.c b/hpoolcfg.c
index 9e21864..8b70389 100644
--- a/hpoolcfg.c
+++ b/hpoolcfg.c
@@ -35,6 +35,7 @@
#define REPORT_UTIL "hpoolcfg"
#include "libhugetlbfs_internal.h"
+#include "hugetlbfs.h"
extern int optind;
extern char *optarg;
@@ -48,6 +49,10 @@ void print_usage()
fprintf(stderr, "options:\n");
OPTION("--pool-list", "List all pools");
+ OPTION("--pool-pages-min <size>=[+|-]<count>", "");
+ CONT("Adjust pool 'size' lower bound");
+ OPTION("--pool-pages-max <size>=[+|-]<count>", "");
+ CONT("Adjust pool 'size' upper bound");
OPTION("--help, -h", "Prints this message");
}
@@ -57,8 +62,10 @@ int opt_dry_run = 0;
/*
* getopts return values for options which are long only.
*/
-#define LONG_POOL ('p' << 8)
-#define LONG_POOL_LIST (LONG_POOL|'l')
+#define LONG_POOL ('p' << 8)
+#define LONG_POOL_LIST (LONG_POOL|'l')
+#define LONG_POOL_MIN_ADJ (LONG_POOL|'m')
+#define LONG_POOL_MAX_ADJ (LONG_POOL|'M')
#define MAX_POOLS 32
void pool_list(void)
@@ -81,6 +88,71 @@ void pool_list(void)
}
}
+void pool_adjust(char *cmd, unsigned int counter)
+{
+ struct hpage_pool pools[MAX_POOLS];
+ int pos;
+ int cnt;
+
+ char *iter = NULL;
+ char *page_size_str = NULL;
+ char *adjust_str = NULL;
+ long page_size;
+ long adjust;
+ unsigned long base = 0;
+
+ /* Extract the pagesize and adjustment. */
+ page_size_str = strtok_r(cmd, ":", &iter);
+ if (page_size_str)
+ adjust_str = strtok_r(NULL, ":", &iter);
+
+ if (!page_size_str || !adjust_str) {
+ ERROR("%s: invalid resize specificiation\n", cmd);
+ exit(EXIT_FAILURE);
+ }
+ DEBUG("page_size<%s> adjust<%s> counter<%d>\n",
+ page_size_str, adjust_str, counter);
+
+ /* Convert and validate the page_size. */
+ page_size = __lh_parse_page_size(page_size_str);
+
+ cnt = __lh_hpool_sizes(pools, MAX_POOLS);
+ if (cnt < 0) {
+ ERROR("unable to obtain pools list");
+ exit(EXIT_FAILURE);
+ }
+ for (pos = 0; cnt--; pos++) {
+ if (pools[pos].pagesize_kb == page_size)
+ break;
+ }
+ if (cnt < 0) {
+ ERROR("%s: unknown page size\n", page_size_str);
+ exit(EXIT_FAILURE);
+ }
+
+ /* Convert and validate the adjust. */
+ adjust = strtol(adjust_str, NULL, 0);
+
+ if (adjust_str[0] == '+' || adjust_str[0] == '-') {
+
+ /*
+ * XXX: reading HUGEPAGES_TOTAL gives you the total pages
+ * in use not what you wrote.
+ */
+ if (counter == HUGEPAGES_TOTAL)
+ base = pools[pos].minimum;
+ else if (counter == HUGEPAGES_OC)
+ base = pools[pos].maximum - pools[pos].minimum;
+ else
+ base = get_huge_page_counter(page_size, counter);
+ } else {
+ if (counter == HUGEPAGES_OC)
+ base = -pools[pos].minimum;
+ }
+ adjust += base;
+ set_huge_page_counter(page_size, counter, adjust);
+}
+
int main(int argc, char** argv)
{
char opts[] = "+h";
@@ -89,6 +161,8 @@ int main(int argc, char** argv)
{"help", no_argument, NULL, 'h'},
{"pool-list", no_argument, NULL, LONG_POOL_LIST},
+ {"pool-pages-min", required_argument, NULL, LONG_POOL_MIN_ADJ},
+ {"pool-pages-max", required_argument, NULL, LONG_POOL_MAX_ADJ},
{0},
};
@@ -113,6 +187,14 @@ int main(int argc, char** argv)
pool_list();
break;
+ case LONG_POOL_MIN_ADJ:
+ pool_adjust(optarg, HUGEPAGES_TOTAL);
+ break;
+
+ case LONG_POOL_MAX_ADJ:
+ pool_adjust(optarg, HUGEPAGES_OC);
+ break;
+
default:
WARNING("unparsed option %08x\n", ret);
ret = -1;
--
1.6.0.1.451.gc8d31
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