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| author | Jianguo Wu <wujianguo@huawei.com> | 2012-12-18 14:23:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-18 15:02:15 -0800 |
| commit | 7179e7bf4592ac5a7b30257a7df6259ee81e51da (patch) | |
| tree | a3fb75a87e1a18b153c18aa7e4530d35c768e8b6 /mm | |
| parent | 7d12efaea7e74bf8f4953412514e836313fa32ec (diff) | |
| download | linux-7179e7bf4592ac5a7b30257a7df6259ee81e51da.tar.gz linux-7179e7bf4592ac5a7b30257a7df6259ee81e51da.tar.bz2 linux-7179e7bf4592ac5a7b30257a7df6259ee81e51da.zip | |
mm/hugetlb: create hugetlb cgroup file in hugetlb_init
Build kernel with CONFIG_HUGETLBFS=y,CONFIG_HUGETLB_PAGE=y and
CONFIG_CGROUP_HUGETLB=y, then specify hugepagesz=xx boot option, system
will fail to boot.
This failure is caused by following code path:
setup_hugepagesz
hugetlb_add_hstate
hugetlb_cgroup_file_init
cgroup_add_cftypes
kzalloc <--slab is *not available* yet
For this path, slab is not available yet, so memory allocated will be
failed, and cause WARN_ON() in hugetlb_cgroup_file_init().
So I move hugetlb_cgroup_file_init() into hugetlb_init().
[akpm@linux-foundation.org: tweak coding-style, remove pointless __init on inlined function]
[akpm@linux-foundation.org: fix warning]
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: <stable@vger.kernel.org>
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.c | 11 | ||||
| -rw-r--r-- | mm/hugetlb_cgroup.c | 19 |
2 files changed, 18 insertions, 12 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index e5318c7793ae..4f3ea0b1e57c 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1906,14 +1906,12 @@ static int __init hugetlb_init(void) default_hstate.max_huge_pages = default_hstate_max_huge_pages; hugetlb_init_hstates(); - gather_bootmem_prealloc(); - report_hugepages(); hugetlb_sysfs_init(); - hugetlb_register_all_nodes(); + hugetlb_cgroup_file_init(); return 0; } @@ -1943,13 +1941,6 @@ void __init hugetlb_add_hstate(unsigned order) h->next_nid_to_free = first_node(node_states[N_MEMORY]); snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB", huge_page_size(h)/1024); - /* - * Add cgroup control files only if the huge page consists - * of more than two normal pages. This is because we use - * page[2].lru.next for storing cgoup details. - */ - if (order >= HUGETLB_CGROUP_MIN_ORDER) - hugetlb_cgroup_file_init(hugetlb_max_hstate - 1); parsed_hstate = h; } diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index b5bde7a5c017..9cea7de22ffb 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -333,7 +333,7 @@ static char *mem_fmt(char *buf, int size, unsigned long hsize) return buf; } -int __init hugetlb_cgroup_file_init(int idx) +static void __init __hugetlb_cgroup_file_init(int idx) { char buf[32]; struct cftype *cft; @@ -375,7 +375,22 @@ int __init hugetlb_cgroup_file_init(int idx) WARN_ON(cgroup_add_cftypes(&hugetlb_subsys, h->cgroup_files)); - return 0; + return; +} + +void __init hugetlb_cgroup_file_init(void) +{ + struct hstate *h; + + for_each_hstate(h) { + /* + * Add cgroup control files only if the huge page consists + * of more than two normal pages. This is because we use + * page[2].lru.next for storing cgroup details. + */ + if (huge_page_order(h) >= HUGETLB_CGROUP_MIN_ORDER) + __hugetlb_cgroup_file_init(hstate_index(h)); + } } /* |