[patch 2/2] sched: fix nr_uninterruptible accounting of frozen tasks really
peterz at infradead.org
Fri Jul 17 08:55:27 PDT 2009
On Fri, 2009-07-17 at 08:51 -0700, Matt Helsley wrote:
> So it's not clear to me how adding PF_FREEZING fixes anything. Am I
> missing something?
Yep, PF_FROZEN is only observed going into schedule(), on the way back
out thaw_process() will already have cleared the flag.
So we don't increment in deactivate_task(), but we do decrement in
activate_task(), yielding for some very unbalanced accounting.
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