Re: vfio problem

[Andreas Hartmann <andihartmann@01019freenet.de>]

Andreas Hartmann wrote:
> On Fri, 08 Jun 2012 11:35:07 -0600
> Alex Williamson <alex.williamson@redhat.com> wrote:
[...]
>> I'm definitely curious if there's anything cumulative about the locked
>> memory problem above.  Thanks,
> 
> Ok, I managed to get it reproducible. I'll describe step by step, how.
> 
> - setting low memory (64k)
> - start VM:
>   qemu-system-x86_64: vfio_dma_map(0x7fbfcf4fd170, 0x00000000febe0000, 0x10000, 0x7fbfb57b0000) = -12 (Cannot allocate memory)
>   Jun  9 14:11:33 host kernel: [12001.026007] vfio_dma_do_map: RLIMIT_MEMLOCK (65536) exceeded
> - VM is up
> - module rt2800pci in VM is loaded fine - no errors can be seen in log.
> - but: device doesn't work (no beaconing)
> - stop hostapd
> - unload wlan stack (hardware + nl80211)
> - reload wlan stack 
> - start hostapd
>   Jun  9 14:16:17 vm kernel: [  286.088795] phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2860.bin'.
>   Jun  9 14:16:17 vm kernel: [  286.090251] phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.34.
>   Jun  9 14:16:18 vm kernel: [  287.194351] phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy [0x0000006a].
>   Jun  9 14:16:19 vm kernel: [  288.294350] phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy [0x0000006a].
>   Jun  9 14:16:19 vm kernel: [  288.294358] phy0 -> rt2800pci_set_device_state: Error - Device failed to enter state 4 (-5).
> - shutdown VM (virsh shutdown VM)
> 
> 
> - set memory to 512M
> - start VM (no RLIMIT_MEMLOCK error)
> - VM is up
> - module rt2800pci doesn't load correctly:
>   Jun  9 14:24:27 vm kernel: [    8.544858] phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2860.bin'.
>   Jun  9 14:24:27 vm kernel: [    8.547870] phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.34.
>   Jun  9 14:24:28 vm kernel: [    9.652364] phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy [0x0000006a].
>   Jun  9 14:24:29 vm kernel: [   10.752363] phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy [0x0000006a].
>   Jun  9 14:24:29 vm kernel: [   10.752371] phy0 -> rt2800pci_set_device_state: Error - Device failed to enter state 4 (-5).
> 
> 
> I didn't manage to remove this error but with rebooting.
> I tried w/ or w/o including the bridge to the bind procedure. I even
> tried to get it working again by loading the module on the host. Could 
> it be probably a issue of rt2800pci?

Update: it can be reseted by s2ram/resume cycle, too.


Regards,
Andreas