Hello everybody, I'm a bit confused regarding windows guests and PIO.. some time ago, I was trying to find out, why one of my windows guests was running terribly slow. After checking the trace-cmd output, Avi stated that windows were using PIO instead of DMA, after changing that, windows indeed got a lot faster. I didn't check traces after that, but I'm now testing host with two windows 2003 guests, and checking the trac-cmd output, I see a lot of kvm_pio calls. While windows don't seem to be running particularly slow, they're not especially fast either, and I'm wandering whether this could be related. But checking IDE bus in guests, they seem to be using DMA which confuses me... so my questions is, what are the kvm_pio operations I see in traces, and how can I tell what is OK and what is wrong, regarding disks DMA/PIO? If somebody could shed some light on this for me, I'd be very grateful... Thanks a lot in advance with best regards nikola ciprich -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@xxxxxxxxxxx -------------------------------------
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