Re: 2.6.26.6-rt11: BUGs (sleeping function called from invalid context)

Peter Zijlstra
2008-11-07T21:48:22Z

On Fri, 2008-11-07 at 13:35 -0800, Fernando Lopez-Lezcano wrote:
> On Fri, 2008-11-07 at 20:16 +0100, Peter Zijlstra wrote:
> > On Fri, 2008-11-07 at 14:01 -0500, Steven Rostedt wrote:
> > > Peter, I think we've seen this before. It is the highmem code sleeping.
> >
> > I've been working on an alternative kmap_atomic implementation for -rt,
> > the below has been build and booted but not stressed, anybody care to
> > give it a spin ?
>
> I'll give it a try. Anything in particular I should try to do? Or not
> do? Or watch for?

Lots of I/O should stress the i386 highmem stuff. If all is well it
works, if not, crashes and splats.

> -- Fernando
>
>
> > ---
> > arch/x86/mm/highmem_32.c | 130 ++++++++++++++++++++++++++++++++++++++++++---
> > include/asm-x86/highmem.h | 11 ----
> > include/linux/sched.h | 5 ++
> > kernel/sched.c | 10 ++++
> > 4 files changed, 137 insertions(+), 19 deletions(-)
> > [MUNCH]
>
>