Shem Multinymous wrote:
On 11/14/06, Suleiman Souhlal <[email protected]> wrote:
I believe that the results returned will always be monotonic, as long as
the frequency of the TSC does not change from under us (that is, without
the kernel knowing). This is because we "synchronize" each CPU's vxtime
with a global time source (HPET) every time we know the TSC rate changes.
Does this hold after a suspend/resume cycle? You could be resuming
with a different CPU clock than what you suspended with, and I'm not
sure anything guarantees an early enough re-sync.
I have to admit that I didn't really design this patch with
suspend/resume in mind, and that I'm not too familiar with how they work.
Do the HPET/ACPI timers still run while the system is suspended?
If not, there shouldn't be any problem, as long as the kernel is
informed of the resume early enough.
-- Suleiman
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