Re: [Qemu-devel] [PATCH][RESEND] Time drift again.

[Jamie Lokier <jamie@shareable.org>]

Gleb Natapov wrote:
>  After my last patch to fix interrupt coalescing was rejected
> on the basis that it is too intrusive we decided to make the
> fix much more localized and only fix the problem for RTC time
> source. Unfortunately it is impossible to fix the problem entirely
> inside RTC code like Andrzej proposed since Windows reads RTC
> register C more then once on each time interrupt so it is impossible
> to count reliably how many interrupt windows actually handled.
> Proposed solution is localized to I386 target and is disabled by
> default. To enable it "-rtc-td-hack" flag should be used.

I truly don't understand why the time correction is done by arcane
guest-specific details like counting register reads, making interrupts
behave different from real hardware, and only correcting guests which
use particular clock sources - instead of simply warping virtual time
(in all the places it's used) which might actually work on all targets
and all guest OSes.

I don't remember anybody responding to that suggestion.
Was it a silly one?

-- Jamie