Re: multipath IB/srp fail-over testing lands up in dump stack in swiotlb_alloc_coherent()

Leon Romanovsky
2016-06-14T13:15:52Z

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On Tue, Jun 14, 2016 at 02:25:15PM +0200, Bart Van Assche wrote:
> On 06/14/2016 02:08 PM, Leon Romanovsky wrote:
> >On Tue, Jun 14, 2016 at 11:24:28AM +0200, Bart Van Assche wrote:
> >>On 06/14/2016 03:56 AM, Laurence Oberman wrote:
> >>>Tracing [ ... ]
> >>
> >>Can you try to set the kernel command line parameter swiotlb to a value that
> >>is a multiple of its default (64MB), reboot and see whether that helps? See
> >>also Documentation/kernel-parameters.txt in the kernel tree.
> >
> >Do you think that 64MB is not enough for this scenario?
>
> Hello Leon,
>
> Does this mean that you think that the "swiotlb buffer is full" messages
> reported by Laurence could be caused by something else than hitting the
> swiotlb limit?

I don't have enough knowledge in that area to answer if message "swiotlb
buffer is full" is correctly explain current situation and I will be
glad to get input from you about it.

Thanks.

>
> Bart.
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