Hi, > Some trace that a request was actually cancelled, but I think I > believe Ah but that must be in guest not on host right? How to grab that from client when it is crashing?
> that. This seems to be the same issue as commits > 1bd075f29ea6d11853475c7c42734595720c3ac6 (iSCSI) and > 473c7f0255920bcaf37411990a3725898772817f (rbd), where the "cancelled" > callback is called before the "complete" callback. If there is the same code in virtio-scsi it might be. > Note how virtio_scsi_request_cancelled is protected against > r->hba_private == NULL, while virtio_scsi_command_complete doesn't. > That's by design, because the latter should never happen or you could > get data corruption in the guest. No idea ;-) i'm not even a C programmer at all. > What version are you running? Does the rbd backend have the above > commit? librbd 0.56.2 qemu current master git (10442558ab1797bfbb01285b909e34c5cf038f12) Stefan Am 11.02.2013 15:12, schrieb Paolo Bonzini: > Il 11/02/2013 15:02, Stefan Priebe - Profihost AG ha scritto: >> Hi, >> >> nothing. What are you searching for? > > Some trace that a request was actually cancelled, but I think I believe > that. This seems to be the same issue as commits > 1bd075f29ea6d11853475c7c42734595720c3ac6 (iSCSI) and > 473c7f0255920bcaf37411990a3725898772817f (rbd), where the "cancelled" > callback is called before the "complete" callback. > > Note how virtio_scsi_request_cancelled is protected against > r->hba_private == NULL, while virtio_scsi_command_complete doesn't. > That's by design, because the latter should never happen or you could > get data corruption in the guest. > > What version are you running? Does the rbd backend have the above commit? > > Paolo > >> Stefan >> Am 11.02.2013 14:59, schrieb Paolo Bonzini: >>> Il 11/02/2013 14:58, Stefan Priebe - Profihost AG ha scritto: >>>> Hi Paolo, >>>> >>>> as the guest crashes i can't check the guest. On the host i just have >>>> the segmentation fault line. Anything else is from the bootprocess or >>>> enabling the tap device. So nothing suspicious. >>> >>> What about log from the serial console? >>> >>> Paolo >>> >>>> Greets, >>>> Stefan >>>> >>>> Am 11.02.2013 14:56, schrieb Paolo Bonzini: >>>>>> Il 11/02/2013 14:35, Stefan Priebe - Profihost AG ha scritto: >>>>>>>> Hi Stefan, >>>>>>>> >>>>>>>> yes i use virtio-scsi-pci in all my guests. As it is the only one where >>>>>>>> i can use fstrim from guest to storage with rbd ;-) >>>>>> >>>>>> Can you check for anything suspicious in the kernel console output? >>>>>> >>> >
