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authorDavid Rientjes <rientjes@google.com>2014-08-12 13:46:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-14 10:56:15 -0600
commit24d7cd207f8e0d6864a314d5f03b5434403ff940 (patch)
tree906bd7bcf4297a42b94ec7ade6bbee7361404afa /mm
parentc8d6637d0497d62093dbba0694c7b3a80b79bfe1 (diff)
downloadlinux-24d7cd207f8e0d6864a314d5f03b5434403ff940.tar.gz
mm, hugetlb_cgroup: align hugetlb cgroup limit to hugepage size
Memcg aligns memory.limit_in_bytes to PAGE_SIZE as part of the resource counter since it makes no sense to allow a partial page to be charged. As a result of the hugetlb cgroup using the resource counter, it is also aligned to PAGE_SIZE but makes no sense unless aligned to the size of the hugepage being limited. Align hugetlb cgroup limit to hugepage size. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Li Zefan <lizefan@huawei.com> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb_cgroup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index 9aae6f47433f..9eebfadeeee1 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -275,6 +275,7 @@ static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of,
ret = res_counter_memparse_write_strategy(buf, &val);
if (ret)
break;
+ val = ALIGN(val, 1ULL << huge_page_shift(&hstates[idx]));
ret = res_counter_set_limit(&h_cg->hugepage[idx], val);
break;
default: