On Fri, Jul 10, 2015 at 05:42:48AM +0200, Alexandre DERUMIER wrote: > >>By the way, why did you choose 10 milliseconds? That is quite long. > >> > >>If this function is called once per 10 ms disk I/O operations then we > >>lose 50% utilization. 1 ms or less would be reasonable. > > From my tests, 1ms is not enough, It still hanging in guest or qmp queries. > 10ms give me optimal balance between bitmap scan speed and guest > responsiveness.
Then I don't fully understand the bug. Fam: can you explain why 1ms isn't enough?
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