Re: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression?

[Linus Torvalds]

On Wed, Apr 27, 2011 at 4:28 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> We _know_ it didn't run continuously for 950ms. That number is totally
> made up. There's not enough work for it to run that long, but more
> importantly, the thread has zero CPU time. There is _zero_ reason to
> believe that it runs for long periods.

Hmm. But it might certainly have run for a _total_ of 950ms. Since
that's just under a second, we wouldn't see it in the "ps" output.

Where is rt_time cleared? I see that subtract in
do_sched_rt_period_timer(), but judging by the caller that is only
called for some timer overrun case (I didn't look at what the
definition of such an overrun is, though). Shouldn't rt_time be
cleared when the task goes to sleep voluntarily?

What am I missing?

                   Linus
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