On Fri, 2008-10-10 at 16:58 +0100, Andy Whitcroft wrote:
> +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;
> +
> + unsigned long min;
> + unsigned long max;
> +
> + /* 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);
> + }
> +
> + min = pools[pos].minimum;
> + max = pools[pos].maximum;
> +
> + if (counter == POOL_MIN) {
> + min = value_adjust(adjust_str, min);
> + if (min > max)
> + max = min;
> + } else {
> + max = value_adjust(adjust_str, max);
> + if (max < min)
> + min = max;
> + }
> +
> + if ((pools[pos].maximum - pools[pos].minimum) < (max - min)) {
> + DEBUG("setting HUGEPAGES_OC to %ld\n", (max - min));
> + set_huge_page_counter(page_size, HUGEPAGES_OC, (max - min));
> + }
> + if (pools[pos].minimum != min) {
> + DEBUG("setting HUGEPAGES_TOTAL to %ld\n", min);
> + set_huge_page_counter(page_size, HUGEPAGES_TOTAL, min);
> + }
> + if ((pools[pos].maximum - pools[pos].minimum) > (max - min)) {
> + DEBUG("setting HUGEPAGES_OC to %ld\n", (max - min));
> + set_huge_page_counter(page_size, HUGEPAGES_OC, (max - min));
> + }
Do we want to verify whether these settings took hold and of not, print
a warning message?
--
Adam Litke - (agl at us.ibm.com)
IBM Linux Technology Center
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