On 04/23/2015 05:47 PM, Andrew Morton wrote:
> On Thu, 23 Apr 2015 17:17:59 -0400 Rik van Riel <r...@redhat.com> wrote:
>
>> There is a helpful comment in do_exit() that states we sync the
>> mm's RSS info before statistics gathering.
>>
>> The function that does the statistics gathering is called right
>> above that comment.
>>
>> Change the code to obey the comment.
>>
>> ...
>>
>> --- a/kernel/exit.c
>> +++ b/kernel/exit.c
>> @@ -711,10 +711,10 @@ void do_exit(long code)
>> current->comm, task_pid_nr(current),
>> preempt_count());
>>
>> - acct_update_integrals(tsk);
>> /* sync mm's RSS info before statistics gathering */
>> if (tsk->mm)
>> sync_mm_rss(tsk->mm);
>> + acct_update_integrals(tsk);
>> group_dead = atomic_dec_and_test(&tsk->signal->live);
>> if (group_dead) {
>> hrtimer_cancel(&tsk->signal->real_timer);
>
> I can't actually find anywhere where these counters are used in the
> accounting code.
Don't the get reported to userspace in things like this?
$ /usr/bin/time ls /dev
...
0.00user 0.00system 0:00.00elapsed 33%CPU (0avgtext+0avgdata
2652maxresident)k
0inputs+0outputs (0major+135minor)pagefaults 0swaps
Though admittedly this thing only reports maxresident...
I think there is some tool that reports the avg resident rss,
but I cannot remember what it is.
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