Am 01.07.2012 um 10:19 schrieb Avi Kivity: > On 06/28/2012 10:27 PM, Peter Lieven wrote: >> >> Am 28.06.2012 um 18:32 schrieb Avi Kivity: >> >>> On 06/28/2012 07:29 PM, Peter Lieven wrote: >>>>> Yes. A signal is sent, and KVM returns from the guest to userspace on >>>>> pending signals. >>> >>>> is there a description available how this process exactly works? >>> >>> The kernel part is in vcpu_enter_guest(), see the check for >>> signal_pending(). But this hasn't seen changes for quite a long while. >> >> Thank you, i will have a look. I noticed a few patches that where submitted >> during the last year, maybe one of them is related: >> >> Switch SIG_IPI to SIGUSR1 >> Fix signal handling of SIG_IPI when io-thread is enabled >> >> In the first commit there is mentioned a "32-on-64-bit Linux kernel bug" >> is there any reference to that? > > > http://web.archiveorange.com/archive/v/1XS1vwGSFLyYygwTXg1K. Are you > running 32-on-64?
I think the issue occurs when running a 32-bit guest on a 64-bit system. Afaik, the isolinux loader where is see the race is 32-bit altough it is a 64-bit ubuntu lts cd image. The second case where i have seen the race is on shutdown of a Windows 2000 Server which is also 32-bit. Peter > > > -- > error compiling committee.c: too many arguments to function > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
