[Maverick] [ti-omap4] SRU: A workaround for highmem issue on OMAP4 platform

[Nicolas Pitre]

On Sun, 26 Sep 2010, Ricardo Salveti de Araujo wrote:

> On Fri, Sep 24, 2010 at 03:04:10AM -0300, Ricardo Salveti de Araujo wrote:
> > Will also test it with only one cpu to see if this could be realted with SMP
> > issues.
> 
> Ok, tested the same kernel but running with only one CPU, for 40 hours (what gave me
> 15 builds), and went all fine, without any errors at both userspace and kernelspace.
> 
> So it seems that this data abort exception could be related with concurrency and
> SMP support at our kernel.

Right.  So I'd suggest you keep highmem off, and 2g:2g on (with the 
VMALLOC_END fix), then try to reliably reproduce the issue with that 
configuration and fix it before involving highmem again.  While highmem 
may make the problem more visible, it also brings a set of added 
complexity of its own which would make the tracking of the issue much 
harder.


Nicolas