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SubjectRe: [PATCH] mm: sync rss-counters at the end of exit_mm()
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<>
>> Reported-by: Markus Trippelsdorf<>
>> Cc: Hugh Dickins<>
>> Cc: KAMEZAWA Hiroyuki<>
> Reviewed-by: KAMEZAWA Hiroyuki<>
> Does this fix recent issue reported ?

I hope so.

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