Luca wrote: > On 6/11/07, Avi Kivity <[EMAIL PROTECTED]> wrote: >> Luca wrote: >> >> >> >> I've managed to reproduce this on kvm-21 (it takes many boots for >> this >> >> to happen, but it does eventually). >> > >> > Hum, any clue on the cause? >> >> From what I've seen, it's the new Linux clocksource code. > > Actually I tried forcing the PIT (and any other combination of > tsc,acpi_pm,jiffies) as the clocksource, without success. >
Well, there's lots of APIC stuff going on when it hangs. >> > Should I test older versions? >> >> They're unlikely to be better. Instead, it would be best to see what >> the guest is doing. >> >> I suggest downloading the source rpm for the kernel, building it, and >> sprinkling printk()s until we know exactly what source the guest is >> executing at the time of the hang. > > Ok, will do. Meanwhile I discovered that the kernel on the boot cd > (the one that hangs) is compiled for i586, while the one installed on > disk is for i686 (this one works). Ah. > > i686 has this options enabled: > > +CONFIG_X86_GOOD_APIC=y > +CONFIG_X86_USE_PPRO_CHECKSUM=y > +CONFIG_X86_TSC=y > > but disabling tsc on the command line doesn't make any difference. Is > it possible that KVM is choking on some instruction not used by the > i686 kernel? Unlikely, as then the hang would occur all the time instead of randomly. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
