Re: Dom0 crash with apache bench (ab)

[Christoffer Dall <cdall@cs.columbia.edu>]

On Fri, Jul 31, 2015 at 03:17:56PM +0200, Christoffer Dall wrote:
> On Fri, Jul 31, 2015 at 12:28 PM, David Vrabel <david.vrabel@citrix.com>
> wrote:
> 
> > On 31/07/15 11:24, Stefano Stabellini wrote:
> > > This is a Linux Dom0 crash on x86 (Dell PowerEdge R320, Xeon E5-2450),
> > > CC'ing relevant people. As you can see from the links below the crash
> > > is:
> > >
> > > [ 253.619326] Call Trace:
> > > [ 253.619330] <IRQ>
> > > [ 253.619332] [<ffffffff815d7c25>] ? skb_copy_ubufs+0xa5/0x230
> > > [ 253.619347] [<ffffffff815e8525>] __netif_receive_skb_core+0x6f5/0x940
> > > [ 253.619353] [<ffffffff815e8788>] __netif_receive_skb+0x18/0x60
> > > [ 253.619360] [<ffffffff815e87f8>] netif_receive_skb_internal+0x28/0x90
> > > [ 253.619366] [<ffffffff815e91f5>] napi_gro_frags+0x125/0x1a0
> > > [ 253.619378] [<ffffffffa01b1173>] mlx4_en_process_rx_cq+0x753/0xb50
> > [mlx4_en]
> > > [ 253.619387] [<ffffffffa01b1657>] mlx4_en_poll_rx_cq+0x97/0x160
> > [mlx4_en]
> >
> > What makes you think this is Xen specific?  I suggest raising this the
> > the mlx4 maintainers.
> >
> >
> Linux native and KVM guests (same hw, same kernel version+config) run just
> fine under the same workload.
> 
Ping?

>From the fact that bare-metal and KVM works fine with this hardware I
still think it's reasonable to assume that it's a Xen issue and not a
mlx4 issue.

Is this completely flawed?

Thanks,
-Christoffer