(beagleboneblack/urtwn) Kernel page fault with the following non-sleepable locks held [ssh on rpi2 comparison]

[Mark Millard]

Ian Lepore ian at freebsd.org  wrote on Tue Jun 21 17:55:28 UTC 2016 :

> On Tue, 2016-06-21 at 08:11 -0300, Otacílio wrote:
> > Em 21/06/2016 07:33, Keith White escreveu:
> > > In an earlier message Ian said that he thought he knew what the
> > > problem was... 
> > 
> > Here the problem occurs  when using wifi. I do not have tested wired 
> > because I don't have a cable here.
> > 
> > 
> > []'s
> > 
> > -Otacilio
> 
> The wifi alignment fault should be fixed as of r302064.  Sorry it took
> so long.
> 
> -- Ian
> 

FYI: I've not had any -r301975 problems with WiFi on my rpi2.

But I cross build for TARGET_ARCH=armv6 with:

> XCFLAGS+= -march=armv7-a -mcpu=cortex-a7
> XCXXFLAGS+= -march=armv7-a -mcpu=cortex-a7

(And similarly for self-hosted.) It may be that the -march and/or -mcpu matter to the code generation and explain my lack of problems.

The builds also have INVARIANTS and WITNESS off.

===
Mark Millard
markmi at dsl-only.net