Re: [ovs-discuss] pskb_expand_head: skb_shared BUG

2015-03-05 Thread Chris Dunlop
On Mon, Mar 02, 2015 at 11:45:11AM +1100, Chris Dunlop wrote: > Heads up... > > We've hit this BUG() in v3.10.70, v3.14.27 and v3.18.7: > > net/core/skbuff.c: > 1027 int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, > 1028 gfp_t

Re: [ovs-discuss] kernel panic under heavy receive load

2015-03-05 Thread Chris Dunlop
sflow collection, the permanent solution is to install v2.3.2 once it's out, and in the meantime you can cherry-pick commit d7ff93d75 on top of v2.3.1 to get your sflow collection working again. Cheers! Chris > On Wednesday, March 4, 2015, Chris Dunlop wrote: > > > On Sat, Feb 28,

Re: [ovs-discuss] kernel panic under heavy receive load

2015-03-04 Thread Chris Dunlop
On Sat, Feb 28, 2015 at 12:49:31PM +1100, Chris Dunlop wrote: > On Fri, Feb 27, 2015 at 08:30:42PM -0500, Xu (Simon) Chen wrote: > > On Fri, Feb 27, 2015 at 6:14 PM, Pravin Shelar wrote: > > > So it looks like vhost is generating shared skb. Can you try same test > > >

Re: [ovs-discuss] pskb_expand_head: skb_shared BUG

2015-03-01 Thread Chris Dunlop
On Mon, Mar 02, 2015 at 11:45:11AM +1100, Chris Dunlop wrote: > Heads up... > > We've hit this BUG() in v3.10.70, v3.14.27 and v3.18.7: > > net/core/skbuff.c: > 1027 int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, > 1028 gfp_t

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 08:33:13PM -0500, Xu (Simon) Chen wrote: > On Fri, Feb 27, 2015 at 7:13 PM, Chris Dunlop wrote: > > On Fri, Feb 27, 2015 at 11:08:21AM -0800, Pravin Shelar wrote: > > > Can you reproduce this bug on hypervisor to hypervisor > > > test without a

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 08:31:46PM -0500, Xu (Simon) Chen wrote: > On Fri, Feb 27, 2015 at 6:49 PM, Chris Dunlop wrote: > > On Fri, Feb 27, 2015 at 06:06:25PM -0500, Xu (Simon) Chen wrote: > > > On Friday, February 27, 2015, Chris Dunlop wrote: > > > > Simon,

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 08:30:42PM -0500, Xu (Simon) Chen wrote: > On Fri, Feb 27, 2015 at 6:14 PM, Pravin Shelar wrote: > > 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 v

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 11:08:21AM -0800, Pravin Shelar wrote: > On Thu, Feb 26, 2015 at 9:13 PM, Chris Dunlop wrote: > > Hi, > > > > "Me too" on Simon's BUG() described below (apologies for the top post). > > Basically: > > > &g

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 06:06:25PM -0500, Xu (Simon) Chen wrote: > On Friday, February 27, 2015, Chris Dunlop wrote: > > 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

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-27 Thread Chris Dunlop
On Fri, Feb 27, 2015 at 11:08:21AM -0800, Pravin Shelar wrote: > On Thu, Feb 26, 2015 at 9:13 PM, Chris Dunlop wrote: > > Hi, > > > > "Me too" on Simon's BUG() described below (apologies for the top post). > > Basically: > > > &g

Re: [ovs-discuss] kernel panic under heavy receive load

2015-02-26 Thread Chris Dunlop
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:[] [] pskb_expand_head+0x234/0x270 ... [ 7318.705710] [] __pskb_pull_tail+0x4c/0x330 [ 7318.711571] [] skb_checksum_help+0x1