Bug#850425: mpt3sas "swiotlb buffer is full" problem only under Xen

[Hans van Kranenburg <hans@knorrie.org>]

On 3/11/19 7:34 AM, Juergen Gross wrote:
> 
> I'm not sure. Patch 3 of this series is basically already there (see
> commit c6d4381220a0087ce19dbf6984d92c451bd6b364). So maybe all we need
> is patch 4, which should really be easy to do?
> 
> Hans, could you give it a try? You'd need to use a 4.20 kernel at least.
> I can do the official patch posting in case you confirm it working.

Ehm ok, well... This is interesting.

I just built a 4.20.13 (without the patch), and I did it from the Debian
kernel team repo, because then I just get all latest config options like
I would get them in Debian.

I rebooted the HP Z820 with it (with Xen 4.11) and I don't see any
errors similar to the ones I pasted earlier.

I haven't been running any domU on it yet (just installed it), but this
is not what I expected.

xen_extra              : .2-pre
xen_version            : 4.11.2-pre
xen_commandline        : placeholder dom0_mem=2G,max:2G
dom0_max_vcpus=1-4 com2=115200,8n1 console=com2,vga noreboot=true
xpti=dom0=false,domu=true smt=off clocksource=tsc tsc=stable:socket

Hans