Re: [PATCH] mm: sync rss-counters at the end of exit_mm()

[Konstantin Khlebnikov]

KAMEZAWA Hiroyuki wrote:
> (2012/04/10 5:03), Konstantin Khlebnikov wrote:
>
> > On task's exit do_exit() calls sync_mm_rss() but this is not enough,
> > there can be page-faults after this point, for example exit_mm() ->
> > mm_release() ->  put_user() (for processing tsk->clear_child_tid).
> > Thus there may be some rss-counters delta in current->rss_stat.

I had to mention it in comment:

This should fix warnings:
BUG: Bad rss-counter state mm:ffff88020813c380 idx:1 val:-1
BUG: Bad rss-counter state mm:ffff88020813c380 idx:2 val:1

> > Signed-off-by: Konstantin Khlebnikov<khlebnikov@xxxxxxxxxx>
> > Reported-by: Markus Trippelsdorf<markus@xxxxxxxxxxxxxxx>
> > Cc: Hugh Dickins<hughd@xxxxxxxxxx>
> > Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@xxxxxxxxxxxxxx>
>
> Reviewed-by: KAMEZAWA Hiroyuki<kamezawa.hiroyu@xxxxxxxxxxxxxx>
>
> Does this fix recent issue reported ?

I hope so.
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