Bug#850425: mpt3sas "swiotlb buffer is full" problem only under Xen
On 3/12/19 8:19 PM, Juergen Gross wrote:
> On 12/03/2019 17:41, Hans van Kranenburg wrote:
>> 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. ;]
>
> I don't think the change is needed any longer.
>
> Christoph's series was meant to fix stuff like that and it did that very
> well.
Clear.
Then for 4.19 in Debian the workaround is documented in here.
And if someone from the kernel team is reading along... Please mark as
solved when >= 4.20 is uploaded to Debian unstable?
Hans
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