Messages in this thread | | | Date | Wed, 02 Apr 2008 12:10:43 +0530 | From | Balbir Singh <> | Subject | Re: [RFC][-mm] Add an owner to the mm_struct (v4) |
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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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