Re: RFH: Kernel OOPS in xen_netbk_rx_action / xenvif_gop_skb

[Philipp Hahn <hahn@univention.de>]

Hello Wei Liu,

On 27.06.2014 19:48, Philipp Hahn wrote:> I guess we found the problem
ourselves: For thus removed skb's the
> reference counter on the associated vif was not decremented, as it is
> normally done in two locations at the end of the function
> xen_netbk_rx_action():
...
> The test is currently running again for the weekend and on Monday we
> will hopefully know more.

FYI: The test VM survived the first reboot without locking up:

Jun 27 19:43:43 xenmbint05b01 kernel: [ 1716.359537] UniDEBUG
vif->mapped is set to false (xenvif_alloc)
Jun 27 19:43:45 xenmbint05b01 kernel: [ 1718.558540] UniDEBUG
vif->mapped is true (xen_netbk_map_frontend_rings)
Jun 27 19:49:23 xenmbint05b01 kernel: [ 2055.895207] UniDEBUG
vif->mapped is set to false(xen_netbk_unmap_frontend_rings)
Jun 27 19:49:23 xenmbint05b01 kernel: [ 2055.898349] UniDEBUG
vif->mapped is false
Jun 27 19:49:23 xenmbint05b01 kernel: [ 2055.898352] UniDEBUG
vif->mapped is false
Jun 27 19:49:25 xenmbint05b01 kernel: [ 2058.529454] UniDEBUG
vif->mapped is set to false (xenvif_alloc)

BYtE
Philipp