Re: DragonFly-2.3.0.876.g136cd master sys/dev/acpica5 acpi_hpet.c

[Sepherosa Ziehau <sepherosa@xxxxxxxxx>]

On Tue, May 5, 2009 at 10:51 AM, Joerg Sonnenberger
<joerg@britannica.bec.de> wrote:
> On Sun, May 03, 2009 at 04:35:04AM -0700, Sepherosa Ziehau wrote:
>>     hpet: Veto Sx state transition, if hpet is the sys_cputimer, since
>>     hpet is not required to function under S1-S5.  Add comment about
>>     the reference to the related hpet standard items.
>
> Huh? Why do you block S3 and S4 as well?

Main counter may not be preserved in S3 and S4; I didn't find a good
spot on the code path to safely save/restore the main counter, that's
also why S1 and S2 are vetoed.  Any insight?

Best Regards,
sephe

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