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SubjectRe: [RFC][-mm] Add an owner to the mm_struct (v4)
KAMEZAWA Hiroyuki wrote:
> On Wed, 02 Apr 2008 08:55:34 +0530
> Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>
>>>> + /*
>>>> + * 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);
>>> Doing above in synchronized manner seems too heavy.
>>> When this happen ? or Can this be done in lazy "on-demand" manner ?
>>>
>> Do you mean under task_lock()?
>>
> No, scanning itself.
> How rarely this scan happens under a server which has 10000- threads ?
>

This routine will be called every time a thread exits, but will quickly exit
after checking mm_need_new_owner()


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


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