DWC OTG TX path optimisation for 11-current

[Hans Petter Selasky]

On 10/05/15 00:51, Andreas Schwarz wrote:
> On 25.09.15, Andreas Schwarz wrote:
>> On 24.09.15, Svatopluk Kraus wrote:
>>
>>> I finally found a way how to get something what could be analyzed
>>> considering the problem with smcs warnings, slow console response, and
>>> other oddities. And it was Michal Meloun who figured out how the
>>> problem comes up. He was so enthusiastic and fast that he got me no
>>> chance, no chance at all to figure it out myself. ;)) Thanks goes to
>>> Bob Prohaska too who pointed me to stress2 which triggers the problem
>>> even with all KTR classes compiled in kernel.
>>
>> This could explain why the legacy BSD scheduler was so stable compared to
>> ULE. I'll patch and start my buildworld loop test (which will take a week
>> (10 loops)).
>
> With this patch my RPI2 is stable like hell. I've completed 10 buildworld
> runs (with -4) in series, without any issues. Please commit, if not done yet.
>
>
> root at pizelot:~ # uname -a
> FreeBSD pizelot.schwarzes.net 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r288200M: Fri Sep 25 08:35:44 CEST 2015
> root at pizelot.schwarzes.net:/usr/obj/usr/src/sys/RPI2-B-ASC  arm
>
>

https://svnweb.freebsd.org/changeset/base/288447

--HPS