On Fri, Feb 27, 2015 at 6:14 PM, Pravin Shelar <pshe...@nicira.com> wrote:
> On Fri, Feb 27, 2015 at 3:06 PM, Xu (Simon) Chen <xche...@gmail.com> > wrote: > > > > > > On Friday, February 27, 2015, Chris Dunlop <ch...@onthe.net.au> wrote: > >> > >> On Fri, Feb 27, 2015 at 11:08:21AM -0800, Pravin Shelar wrote: > >> > On Thu, Feb 26, 2015 at 9:13 PM, Chris Dunlop <ch...@onthe.net.au> > >> > wrote: > >> > > Hi, > >> > > > >> > > "Me too" on Simon's BUG() described below (apologies for the top > >> > > post). > >> > > Basically: > >> > > > >> > > [ 7318.409796] kernel BUG at net/core/skbuff.c:1041! > >> > > ... > >> > > [ 7318.591562] RIP: 0010:[<ffffffff813eb634>] [<ffffffff813eb634>] > >> > > pskb_expand_head+0x234/0x270 > >> > > ... > >> > > [ 7318.705710] [<ffffffff813eb6fc>] __pskb_pull_tail+0x4c/0x330 > >> > > [ 7318.711571] [<ffffffff813f8ca7>] skb_checksum_help+0x147/0x1a0 > >> > > [ 7318.717599] [<ffffffffa07de8b0>] > >> > > queue_userspace_packet+0x3f0/0x440 [openvswitch] > >> > > > >> > > I've hit this BUG() several times within hours or days of running on > >> > > v3.14.27 > >> > > and v3.14.33, whereas the box previously ran for months on v3.10.33 > >> > > without an > >> > > issue. > >> > > >> > Can you reproduce this bug on hypervisor to hypervisor test without > any > >> > VMs? > >> > >> I don't know. > >> > >> Sorry, I've only seen the problem after many hours of running in > >> a production environment, and I don't have the spare facilities > >> to run the hypervisor to hypervisor testing and risk the crash. > >> > >> Simon, are you able to try your test running direct hypervisor > >> to hypervisor? > > > > > > Nope... I have only seen this between VMs. After repeated tests, it has > got > > worse that an iperf run would almost immediately trigger a crash. > > So it looks like vhost is generating shared skb. Can you try same test > on latest upstream kernel? > I don't know whether it's vhost, as for me the VM receiving high volume consistently crashes. I previously had trouble building OVS datapath module on newer kernels. What is the latest kernel that I should try? Thanks. -Simon _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
