lkml.org 
[lkml]   [2008]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Fwd: [-mm] Add an owner to the mm_struct (v9)]
On 04/15, Paul Menage wrote:
>
> On Tue, Apr 15, 2008 at 10:13 AM, Oleg Nesterov <oleg@tv-sign.ru> wrote:
> >
> > Let's suppose the process with a lot of threads does exit_group() and nobody
> > else uses this ->mm. How many time we will re-assign mm->owner and iterate
> > over the all threads in system ?
> >
>
> In general we won't get to the third loop, since one of the first two
> loops (children or siblings) will find another mm user.

Well yes, the second loop checks parent->children ... all sub-threads have
the same parent.

I'd suggest to use ->real_parent though. And the third loop could be

for_each_process(g) {
c = g;
do {
if (!c->mm)
continue;
if (c->mm != mm)
break;
goto assign_new_owner;
} while_each_thread(g, c);
}

Still. can't we make mm->mm_users_list ?

Oleg.



\
 
 \ /
  Last update: 2008-04-15 23:03    [W:0.055 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site