netdev - Re: tg3 NIC driver bug in 3.14.x under Xen [and 3 more messages]

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Message-ID: <21798.44949.156680.399387@mariner.uk.xensource.com>
Date:	Thu, 9 Apr 2015 17:57:57 +0100
From:	Ian Jackson <Ian.Jackson@...citrix.com>
To:	Prashant Sreedharan <prashant@...adcom.com>
CC:	Michael Chan <mchan@...adcom.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"David Vrabel" <david.vrabel@...rix.com>,
	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>,
	Vlad Yasevich <vyasevich@...il.com>,
	"Nithin Nayak Sujir" <nsujir@...adcom.com>,
	<xen-devel@...ts.xensource.com>, <netdev@...r.kernel.org>
Subject: Re: tg3 NIC driver bug in 3.14.x under Xen [and 3 more messages]

Prashant Sreedharan writes ("Re: tg3 NIC driver bug in 3.14.x under Xen [and 3 more messages]"):
> On Thu, 2015-04-09 at 12:11 +0100, Ian Jackson wrote:
> > No.  I can try to repro the problem without the bridge, if it would
> > help.
> yes please do

I will do so.

FYI, when I came back to this test box just now (after leaving it
since yesterday) and now it is completely broken:

[89210.340696] DMA: Out of SW-IOMMU space for 1600 bytes at device 0000:03:00.0
[89210.449936] tg3 0000:03:00.0: swiotlb buffer is full (sz: 1600 bytes)

The root fs block device is also unuseable and gives lots of EIO.

This is with 3.14.21, baremetal, with `iommu=soft swiotlb=force'.

Ian.
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