Messages in this thread | | | Date | Sat, 20 Dec 2014 13:16:29 -0800 | Subject | Re: frequent lockups in 3.18rc4 | From | Linus Torvalds <> |
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On Sat, Dec 20, 2014 at 10:25 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > > How/where is the HPET overflow case handled? I don't know the code enough.
Hmm, ok, I've re-acquainted myself with it. And I have to admit that I can't see anything wrong. The whole "update_wall_clock" and the shadow timekeeping state is confusing as hell, but seems fine. We'd have to avoid update_wall_clock for a *long* time for overflows to occur.
And the overflow in 32 bits isn't that special, since the only thing that really matters is the overflow of "cycle_now - tkr->cycle_last" within the mask.
So I'm not seeing anything even halfway suspicious.
Linus
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