On Thu, Nov 20, 2008 at 12:22:53PM -0200, Eduardo Habkost wrote: > > Hi, > > When using a kvm.git kernel as host, I am getting guest boot failures > when booting Fedora Rawhide kernel (2.6.27.5-117.fc10.x86_64). Guest > stops booting at: > > ENABLING IO-APIC IRQs > ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 > ..MP-BIOS bug: 8254 timer not connected to IO-APIC > ...trying to set up timer (IRQ0) through the 8259A ... > ..... (found apic 0 pin 0) ... > ....... failed. > ...trying to set up timer as Virtual Wire IRQ... > ..... failed. > ...trying to set up timer as ExtINT IRQ...
I've just found out this problem happens because the guest has HZ=1000 and the host had HZ=250 and no CONFIG_HIGH_RES_TIMERS. With this setup, the host is not managing to inject enough timer interrupts during the mdelay() loop on timer_irq_works(). -- Eduardo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
