Bug#850425: mpt3sas "swiotlb buffer is full" problem only under Xen
On 3/12/19 5:04 PM, Juergen Gross wrote:
> On 11/03/2019 20:50, Hans van Kranenburg wrote:
>> 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.
>
> Well, commit c6d4381220a0087ce19dbf6984d92c451bd6b364 is part of a
> rather large series making the dma interface cleaner and using it more
> correctly where appropriate. Maybe your use case is covered by this
> series already.
It seems so. That's good, of course, but it also means that I cannot be
of any use here any more to test the additional proposed change. ;]
Except, for trying it to see if it won't introduce more regressions and
explosions, if you want me to.
Hans
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