On Tue, 28 Aug 2007 10:27:09 +0200
Clemens Ladisch <[email protected]> wrote:
> Luck, Tony wrote:
> > [...] Given that the hang went away when you applied the earlier patch, I
> > conclude that the drivers/char/hpet.c code is the one that got selected when
> > you had two "hpet" entries ... and that there is something wrong with that
> > code that doesn't work right on x86_64.
>
> Apparently, the 'generic' code was just copied from ia64 and assumes that the
> timer is 64 bits. This is not true with hardware from VIA (even on x86_64).
The hardware of this PC is Intel, not VIA.
>
> This patch should make it work (although I'd prefer to set the mask
> dynamically
> according to the hardware caps).
>
> --- a/drivers/char/hpet.c Tue Aug 28 09:42:22 2007
> +++ b/drivers/char/hpet.c Tue Aug 28 10:16:54 2007
> @@ -73,7 +73,7 @@
> .name = "hpet",
> .rating = 250,
> .read = read_hpet,
> - .mask = CLOCKSOURCE_MASK(64),
> + .mask = CLOCKSOURCE_MASK(32),
Anyway, I've applied it (manually... whitespace/mime damage) to -rc4 and
it seems to work, no crash so far (I'm sure I'm testing it because
plain -rc4 doesn't have the "2hpet" fix and still manifest the problem).
--
Paolo Ornati
Linux 2.6.23-rc4-dirty on x86_64
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