Commit 24d7cd20 authored Aug 12, 2014 by David Rientjes Committed by Linus Torvalds Aug 14, 2014

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>

parent c8d6637d

mm/hugetlb_cgroup.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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:

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