Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)

[Andi Kleen]

Ingo Molnar <mingo@xxxxxxx> writes:

> * Andrea Arcangeli <andrea@xxxxxxx> wrote:
> 
> > I thought time() wouldn't be called more than 1 per second anyways,
> > why would anyone call time more than 1 per second?
> 
> if mysql in fact calls time() frequently, then it should rather start a
> worker thread that updates a global time variable every second.

I just fixed the x86-64 vsyscall vtime() to only read the user mapped
__xtime.tv_sec.  This should be equivalent. Only drawback is that if a
timer tick is delayed for too long it won't fix that, but I guess
that's reasonable for a 1s resolution.

-Andi
 
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