| Re: [PATCH v5 2/2] decrement static keys on real destroy time [message #46373 is a reply to message #46354] |
Wed, 16 May 2012 07:03   |
Glauber Costa
Messages: 916
Registered: October 2011
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Senior Member |
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On 05/14/2012 05:38 AM, Li Zefan wrote:
>> +static void disarm_static_keys(struct mem_cgroup *memcg)
>
>> +{
>> +#ifdef CONFIG_INET
>> + if (memcg->tcp_mem.cg_proto.activated)
>> + static_key_slow_dec(&memcg_socket_limit_enabled);
>> +#endif
>> +}
>
>
> Move this inside the ifdef/endif below ?
>
> Otherwise I think you'll get compile error if !CONFIG_INET...
I don't fully get it.
We are supposed to provide a version of it for
CONFIG_CGROUP_MEM_RES_CTLR_KMEM and an empty version for
!CONFIG_CGROUP_MEM_RES_CTLR_KMEM
Inside the first, we take an action for CONFIG_INET, and no action for
!CONFIG_INET.
Bear in mind that the slab patches will add another test to that place,
and that's why I am doing it this way from the beginning.
Well, that said, I not only can be wrong, I very frequently am.
But I just compiled this one with and without CONFIG_INET, and it seems
to be going alright.
>> +
>> #ifdef CONFIG_INET
>> struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg)
>> {
>> @@ -452,6 +462,11 @@ struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg)
>> }
>> EXPORT_SYMBOL(tcp_proto_cgroup);
>> #endif /* CONFIG_INET */
>> +#else
>> +static inline void disarm_static_keys(struct mem_cgroup *memcg)
>> +{
>> +}
>> +
>> #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
>
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