* Changing clock in KVM host may cause VM to hang @ 2011-08-13 0:10 编码人 [not found] ` <CAFTsVLT0k-QAGwcdOFHRXBE0bU-7uS-3z=FwT6y7ZhzgRAUQpg@mail.gmail.com> 0 siblings, 1 reply; 5+ messages in thread From: 编码人 @ 2011-08-13 0:10 UTC (permalink / raw) To: kvm Hi, My KVM guest OS is Windows 7. If I change the clock in KVM host (Redhat Enterprise Linux 6), Windows may hang --I can't move mouse in the VNC desktop. (If I only set clock to be several minutes faster, then there is no problems. If I set it to be one day faster, then the problem occurs.) Does anyone know why it happens? How can we solve it? BTW, is there a good way to synchronize the clock between the host and the guest? Thanks, ff ^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <CAFTsVLT0k-QAGwcdOFHRXBE0bU-7uS-3z=FwT6y7ZhzgRAUQpg@mail.gmail.com>]
* Re: Changing clock in KVM host may cause VM to hang [not found] ` <CAFTsVLT0k-QAGwcdOFHRXBE0bU-7uS-3z=FwT6y7ZhzgRAUQpg@mail.gmail.com> @ 2011-08-16 7:50 ` 编码人 2011-08-16 10:51 ` lidong chen 2011-08-17 2:57 ` Xiao Guangrong 0 siblings, 2 replies; 5+ messages in thread From: 编码人 @ 2011-08-16 7:50 UTC (permalink / raw) To: kvm Hi, Does anyone know this issue? Thanks, Paul On Sat, Aug 13, 2011 at 8:10 AM, 编码人 <flypen@gmail.com> wrote: > > Hi, > > My KVM guest OS is Windows 7. If I change the clock in KVM host > (Redhat Enterprise Linux 6), Windows may hang --I can't move mouse in > the VNC desktop. (If I only set clock to be several minutes faster, > then there is no problems. If I set it to be one day faster, then the > problem occurs.) > > Does anyone know why it happens? How can we solve it? BTW, is there a > good way to synchronize the clock between the host and the guest? > > Thanks, > ff ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Changing clock in KVM host may cause VM to hang 2011-08-16 7:50 ` 编码人 @ 2011-08-16 10:51 ` lidong chen 2011-08-17 2:32 ` 编码人 2011-08-17 2:57 ` Xiao Guangrong 1 sibling, 1 reply; 5+ messages in thread From: lidong chen @ 2011-08-16 10:51 UTC (permalink / raw) To: 编码人; +Cc: kvm 2011/8/16 编码人 <flypen@gmail.com>: > Hi, > > Does anyone know this issue? > > Thanks, > Paul > > On Sat, Aug 13, 2011 at 8:10 AM, 编码人 <flypen@gmail.com> wrote: >> >> Hi, >> >> My KVM guest OS is Windows 7. If I change the clock in KVM host >> (Redhat Enterprise Linux 6), Windows may hang --I can't move mouse in >> the VNC desktop. (If I only set clock to be several minutes faster, >> then there is no problems. If I set it to be one day faster, then the >> problem occurs.) >> >> Does anyone know why it happens? How can we solve it? BTW, is there a >> good way to synchronize the clock between the host and the guest? you can run ntp client in guest os to synchronize time with host os. >> >> Thanks, >> ff > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Changing clock in KVM host may cause VM to hang 2011-08-16 10:51 ` lidong chen @ 2011-08-17 2:32 ` 编码人 0 siblings, 0 replies; 5+ messages in thread From: 编码人 @ 2011-08-17 2:32 UTC (permalink / raw) To: lidong chen; +Cc: kvm Hi, Lidong, Yes, running ntp client in Guest OS can synchronize the time. But if I change the clock of the host, the Guest OS may immediately have problems, and the clock perhaps has no chances to synchronize. Thanks, Paul 2011/8/16 lidong chen <chen.lidong.kernel@gmail.com>: > 2011/8/16 编码人 <flypen@gmail.com>: >> Hi, >> >> Does anyone know this issue? >> >> Thanks, >> Paul >> >> On Sat, Aug 13, 2011 at 8:10 AM, 编码人 <flypen@gmail.com> wrote: >>> >>> Hi, >>> >>> My KVM guest OS is Windows 7. If I change the clock in KVM host >>> (Redhat Enterprise Linux 6), Windows may hang --I can't move mouse in >>> the VNC desktop. (If I only set clock to be several minutes faster, >>> then there is no problems. If I set it to be one day faster, then the >>> problem occurs.) >>> >>> Does anyone know why it happens? How can we solve it? BTW, is there a >>> good way to synchronize the clock between the host and the guest? > > you can run ntp client in guest os to synchronize time with host os. > >>> >>> Thanks, >>> ff >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Changing clock in KVM host may cause VM to hang 2011-08-16 7:50 ` 编码人 2011-08-16 10:51 ` lidong chen @ 2011-08-17 2:57 ` Xiao Guangrong 1 sibling, 0 replies; 5+ messages in thread From: Xiao Guangrong @ 2011-08-17 2:57 UTC (permalink / raw) To: 编码人; +Cc: kvm On 08/16/2011 03:50 PM, 编码人 wrote: > Hi, > > Does anyone know this issue? > Could you describe your environment more detailed please? - Your host information (32/64, cpuinfo) - Your guest information (32/64) And please enable the trace events of kvm to see what happened when the guest was hanging: mount -t debugfs none /debug echo 1 > /debug/tracing/events/kvm/enable cat /debug/trace I'll try to reproduce it. Thanks! ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-08-17 2:55 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-08-13 0:10 Changing clock in KVM host may cause VM to hang 编码人 [not found] ` <CAFTsVLT0k-QAGwcdOFHRXBE0bU-7uS-3z=FwT6y7ZhzgRAUQpg@mail.gmail.com> 2011-08-16 7:50 ` 编码人 2011-08-16 10:51 ` lidong chen 2011-08-17 2:32 ` 编码人 2011-08-17 2:57 ` Xiao Guangrong
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