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? _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
