Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-26 Thread extmaillist
Hi Glauber, sorry for late reply. well, I'm no longer able to reproduce the problem in the same way (with backtraces etc) as before, but anyways enabling paravirt_clock with or without Your patches on SMP guest still causes troubles: on my phenom machine, the kernel hangs after printing PCI-GART

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-24 Thread Glauber Costa
On Mon, Apr 21, 2008 at 4:15 AM, Gerd Hoffmann [EMAIL PROTECTED] wrote: Marcelo Tosatti wrote: From what me and marcelo discussed, I think there's a possibility that it has marginally something to do with precision of clock calculation. Gerd's patches address that issues. Can somebody

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-21 Thread Gerd Hoffmann
Marcelo Tosatti wrote: From what me and marcelo discussed, I think there's a possibility that it has marginally something to do with precision of clock calculation. Gerd's patches address that issues. Can somebody test this with those patches (both guest and host), while I'm off ? Haven't

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-19 Thread Marcelo Tosatti
On Mon, Apr 07, 2008 at 06:34:57PM -0300, Marcelo Tosatti wrote: On Mon, Apr 07, 2008 at 01:53:36PM +0200, Nikola Ciprich wrote: Hi, I also tried paravirt clock again in latest git with kvm-65 patch applied, and problem with cpu-lockups persists: [10813.654806] BUG: soft lockup -

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-19 Thread Glauber Costa
On Sat, Apr 19, 2008 at 12:29 PM, Marcelo Tosatti [EMAIL PROTECTED] wrote: On Mon, Apr 07, 2008 at 06:34:57PM -0300, Marcelo Tosatti wrote: On Mon, Apr 07, 2008 at 01:53:36PM +0200, Nikola Ciprich wrote: Hi, I also tried paravirt clock again in latest git with kvm-65 patch

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-19 Thread Marcelo Tosatti
On Sat, Apr 19, 2008 at 12:29:47PM -0300, Marcelo Tosatti wrote: I just reproduced this on a UP guest. Were you seeing the exact same stack trace in the guest with kvm-64 ? I've been able to reproduce the problem. Symptoms are that when using NOHZ vcpu0 LAPIC timer is ticking far less than

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-19 Thread Marcelo Tosatti
On Sat, Apr 19, 2008 at 01:22:28PM -0300, Glauber Costa wrote: I've been able to reproduce the problem. Symptoms are that when using NOHZ vcpu0 LAPIC timer is ticking far less than the others (apparently vcpu0 is the only one ticking correctly): nohz=on with kvmclock [EMAIL

[kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-07 Thread Nikola Ciprich
Hi, I also tried paravirt clock again in latest git with kvm-65 patch applied, and problem with cpu-lockups persists: [10813.654806] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] [10813.655789] CPU 0: [10813.656624] Modules linked in: virtio_pci virtio_ring virtio_blk virtio piix

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-07 Thread Marcelo Tosatti
On Mon, Apr 07, 2008 at 01:53:36PM +0200, Nikola Ciprich wrote: Hi, I also tried paravirt clock again in latest git with kvm-65 patch applied, and problem with cpu-lockups persists: [10813.654806] BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] [10813.655789] CPU 0: [10813.656624]

Re: [kvm-devel] paravirt clock stil causing hangs in kvm-65

2008-04-07 Thread Marcelo Tosatti
On Mon, Apr 07, 2008 at 06:34:57PM -0300, Marcelo Tosatti wrote: On Mon, Apr 07, 2008 at 01:53:36PM +0200, Nikola Ciprich wrote: Hi, I also tried paravirt clock again in latest git with kvm-65 patch applied, and problem with cpu-lockups persists: [10813.654806] BUG: soft lockup -