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SubjectRe: [-mm] Add an owner to the mm_struct (v9)
KAMEZAWA Hiroyuki wrote:
> maybe I don't undestand correctlly...
>
> On Thu, 10 Apr 2008 14:46:02 +0530
> Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>
>>
>> +config MM_OWNER
>> + bool
>> +
> no default is ok here ? what value will this have if not selected ?
> I'm sorry if I misunderstand Kconfig.
>

The way this works is

If I select memory resource controller, CONFIG_MM_OWNER is set to y, else it
does not even show up in the .config

>
>> + /*
>> + * Search through everything else. We should not get
>> + * here often
>> + */
>> + do_each_thread(g, c) {
>> + if (c->mm == mm)
>> + goto assign_new_owner;
>> + } while_each_thread(g, c);
>> +
>
> Again, do_each_thread() is suitable here ?
> for_each_process() ?
>

do_each_thread(), while_each_thread() walks all processes and threads of those
processes in the system. It is a common pattern used in the kernel (see
try_to_freeze_tasks() or oom_kill_task() for example).

> Thanks,
> -Kame
>


--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL


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