Re: CVS commit: src/sys/dev

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Mon, Nov 09, 2009 at 07:04:41PM -0600, David Young wrote:
> > Modified Files:
> >     src/sys/dev: cgd.c
> > 
> > Log Message:
> > Don't allocate block buffers on the stack. This can cause stack overflows
> > in the kernel and breaks SSP builds.
> 
> This is a step in the right direction, but now cgd(4) is doing
> malloc(..., M_WAITOK) in (software) interrupt context.

I'm sorry, I didn't realise that it was called in that context.

> A LOCKDEBUG kernel will panic.  How can we avoid the stack
> overflows and such in a different way?

I'll try to rewrite the code to use M_NOWAIT.

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/