[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xm save -c problem with GPLPV drivers and winxp
On Sun, Dec 16, 2012 at 02:46:02PM +0200, Pasi Kärkkäinen wrote: > On Sun, Dec 16, 2012 at 01:29:51AM -0800, Liu.yi wrote: > > hi,all > > Hello, > > I added the important keywords to the subject.. > > -- Pasi > > > I have a winxpsp2 vm with gplpv driver installed. The problem is that > > when I excute "xm save -c winxpsp2 save.bin", the command is excuted > > successfully but the vm hang after issuing a disk operaton. > > After installing gplpv debug driver, from the qemu log I found vbd > > resume failed, after a while windows issues disk reset command, then vm > > hang. > > xm debug-keys shows as follows before "xm save -c": > > (XEN) 1 [0/1]: s=3 n=0 d=0 p=72 x=1 > > (XEN) 2 [0/0]: s=3 n=0 d=0 p=71 x=0 > > (XEN) 3 [0/1]: s=2 n=0 d=0 x=0 > > (XEN) 4 [0/0]: s=6 n=0 x=0 // pdo_event_channel > > (XEN) 5 [0/0]: s=2 n=0 d=0 x=0 // suspend_evtchn > > (XEN) 6 [0/0]: s=3 n=0 d=0 p=73 x=0 // vbd-768 event-channel > > (XEN) 7 [0/0]: s=3 n=0 d=0 p=74 x=0 // vif-0 event-channel > > xm debug-keys shows as follows after "xm save -c": > > (XEN) 1 [0/1]: s=3 n=0 d=0 p=72 x=1 > > (XEN) 2 [0/0]: s=3 n=0 d=0 p=71 x=0 > > (XEN) 3 [0/1]: s=2 n=0 d=0 x=0 > > (XEN) 4 [0/0]: s=6 n=0 x=0 // pdo_event_channel > > (XEN) 5 [0/0]: s=2 n=0 d=0 x=0 // suspend_evtchn > > (XEN) 6 [0/0]: s=6 n=0 x=0 // new pdo_event_channel > > (XEN) 7 [0/0]: s=2 n=0 d=0 x=0 // new suspend_evtchn > > (XEN) 8 [0/0]: s=3 n=0 d=0 p=? x=0 // new vbd-768 event-channel > > // vif-0 > > resume don't start at all because resume hang at vbd > > > > blkback and blkif driver seem free their event-channel in > > unbind_from_irqhandler when suspending, so when gplpv driver resumes it > > starts allocing event-channel from 6. The strange things is that gplpv > > driver allocs new pdo_event_channel and suspend_evtchn (6 and 7), the > > previous ones retain active. > > I tried to unbind the old pdo_event_channel and suspend_evtchn, but > > suspending vm hang. "xm save -c" wokrs if I reuse the old pdo_event_channel > > and suspend_evtchn as follows: > > > > in evtchn.c:EvtChn_Init() > > KeInitializeEvent(&xpdd->pdo_suspend_event, SynchronizationEvent, > > FALSE); > > if (xpdd->pdo_event_channel == 0) { > > KdPrint((__DRIVER_NAME " create new pdo_event_channel\n")); > > xpdd->pdo_event_channel = EvtChn_AllocIpi(xpdd, 0); > > } > > in xenpci_fdo.c:XenPci_ConnectSuspendEvt() > > if (xpdd->suspend_evtchn == 0) { > > xpdd->suspend_evtchn = EvtChn_AllocUnbound(xpdd, 0); > > KdPrint((__DRIVER_NAME " create new suspend event > > channel\n")); > > } > > > > The qemu log show vbd and vif resume successfully, vm runs fine. > > I'm not sure about these modifications to gplpv windows driver. I will > > be grateful for any suggestions, thks. > > > > > > CC-ing the author of the driver (James). _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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