From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Christoffer Dall <cdall@cs.columbia.edu>
Cc: Wei Liu <wei.liu2@citrix.com>,
Ian Campbell <ian.campbell@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
xen-devel@lists.xen.org,
Christoffer Dall <christofferdall@gmail.com>,
David Vrabel <david.vrabel@citrix.com>
Subject: Re: Dom0 crash with apache bench (ab)
Date: Mon, 14 Sep 2015 11:11:08 -0400 [thread overview]
Message-ID: <20150914144957.GC19667@x230> (raw)
In-Reply-To: <20150914124008.GA17195@cbox>
On Mon, Sep 14, 2015 at 02:40:08PM +0200, Christoffer Dall wrote:
> 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?
I have a feeling it is an mlx4 issue but you don't easily reproduce it
under baremetal. Is there any way you could boot baremetal with
'iommu=soft swiotlb=force' to see if you can reproduce it under those
conditions?
thanks!
>
> Thanks,
> -Christoffer
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2015-09-14 15:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-28 13:09 Dom0 crash with apache bench (ab) Christoffer Dall
2015-07-28 14:50 ` Konrad Rzeszutek Wilk
2015-07-28 14:55 ` Ian Campbell
2015-07-28 15:00 ` Christoffer Dall
2015-07-31 10:24 ` Stefano Stabellini
2015-07-31 10:28 ` David Vrabel
2015-07-31 13:17 ` Christoffer Dall
2015-09-14 12:40 ` Christoffer Dall
2015-09-14 15:11 ` Konrad Rzeszutek Wilk [this message]
2015-09-14 15:20 ` Ian Campbell
2015-09-14 16:16 ` Christoffer Dall
2015-09-28 20:53 ` Christoffer Dall
2015-09-30 15:12 ` Konrad Rzeszutek Wilk
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