> > side note: page lock contention is very common case.
quoted text
> > 
> > For case (8), I don't think sleeping is right way. get_page() is used in really various place of
> > our kernel. so we can't assume it's only temporary reference count increasing.
> 
> In what case is a munlocked pages reference count permanently increased and
> why is this not a memory leak?

V4L, audio, GEM and/or other multimedia driver?



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