Re: [PATCH v2 UPDATE] mm/hugetlb: create hugetlb cgroup file in hugetlb_init

[Jianguo Wu <wujianguo-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>]

On 2012/12/13 21:56, Michal Hocko wrote:

> On Thu 13-12-12 11:39:17, Jianguo Wu wrote:
>> Build kernel with CONFIG_HUGETLBFS=y,CONFIG_HUGETLB_PAGE=y
>> and CONFIG_CGROUP_HUGETLB=y, then specify hugepagesz=xx boot option,
>> system will boot fail.
>>
>> 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().
>>
>> Changelog:
>>   do code refactor as suggesting by Aneesh
>>   add Reviewed-by and Acked-by 
>>
>> Signed-off-by: Jianguo Wu <wujianguo-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
>> Signed-off-by: Jiang Liu <jiang.liu-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
>> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
>> Acked-by: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>
> 
> Any reason to not add Cc: stable as I suggested earlier?

Hi Michal,

Sorry for forgot that.
Andrew has added Cc: stable when added to -mm tree.