Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3

[Suresh Siddha]

On Tue, Mar 04, 2008 at 11:32:20AM +0100, Ingo Molnar wrote:
> 
> * Suresh Siddha <suresh.b.siddha@xxxxxxxxx> wrote:
> 
> > On Mon, Mar 03, 2008 at 08:20:12PM -0500, Christoph Hellwig wrote:
> > > On Mon, Mar 03, 2008 at 03:02:46PM -0800, Suresh Siddha wrote:
> > > > +	/*
> > > > +	 * Memory allocation at the first usage of the FPU and other state.
> > > > +	 */
> > > > +	if (!tsk->thread.xstate)
> > > > +		tsk->thread.xstate = kmem_cache_alloc(task_xstate_cachep, GFP_KERNEL);
> > >
> > >  Also don't we need some kind of error handling here?
> > 
> > Currently it uses SLAB_PANIC.
> 
> but SLAB_PANIC only covers kmem_cache_create() failures. 
> 
> kmem_cache_alloc() can fail (return NULL) and not handling it is a bug.

oops. you are correct. Will send a sigsegv in the failure case then. Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/