Add a field to the subpool structure to indicate the minimimum number of huge pages to always be used by this subpool. This minimum count includes allocated pages as well as reserved pages. If the minimum number of pages for the subpool have not been allocated, pages are reserved up to this minimum. An additional field (rsv_hpages) is used to track the number of pages reserved to meet this minimum size. The hstate pointer in the subpool is convenient to have when reserving and unreserving the pages.
Signed-off-by: Mike Kravetz <[email protected]> --- include/linux/hugetlb.h | 2 ++ mm/hugetlb.c | 3 +++ 2 files changed, 5 insertions(+) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 431b7fc..cfe13fd 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -23,6 +23,8 @@ struct hugepage_subpool { spinlock_t lock; long count; long max_hpages, used_hpages; + struct hstate *hstate; + long min_hpages, rsv_hpages; }; struct resv_map { diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 85032de..07b7226 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -85,6 +85,9 @@ struct hugepage_subpool *hugepage_new_subpool(long nr_blocks) spool->count = 1; spool->max_hpages = nr_blocks; spool->used_hpages = 0; + spool->hstate = NULL; + spool->min_hpages = 0; + spool->rsv_hpages = 0; return spool; } -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
