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authorMike Kravetz <mike.kravetz@oracle.com>2015-04-16 02:13:42 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 02:35:18 +0300
commit7ca02d0ae586fe7df59632966a64f3f1a756ef05 (patch)
tree71a66a1c50afb8b8e47c48058695693b7f405cb3 /include
parent1c5ecae3a93fa1ab51a784d77e9c9ed54e67c65f (diff)
downloadlinux-7ca02d0ae586fe7df59632966a64f3f1a756ef05.tar.xz
hugetlbfs: accept subpool min_size mount option and setup accordingly
Make 'min_size=<value>' be an option when mounting a hugetlbfs. This option takes the same value as the 'size' option. min_size can be specified without specifying size. If both are specified, min_size must be less that or equal to size else the mount will fail. If min_size is specified, then at mount time an attempt is made to reserve min_size pages. If the reservation fails, the mount fails. At umount time, the reserved pages are released. Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hugetlb.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index d1a77b87408d..5713c49a4a5c 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -44,7 +44,8 @@ extern int hugetlb_max_hstate __read_mostly;
#define for_each_hstate(h) \
for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
-struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
+struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
+ long min_hpages);
void hugepage_put_subpool(struct hugepage_subpool *spool);
void reset_vma_resv_huge_pages(struct vm_area_struct *vma);