Re: [patch] sched: unlocked context-switches

[Richard Henderson]

On Sat, Apr 09, 2005 at 03:46:12PM -0700, David S. Miller wrote:
> On Sat, 09 Apr 2005 19:22:23 +1000
> Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> > ppc64 already has a local_irq_save/restore in switch_to, around the low
> > level asm bits, so it should be fine.
> 
> Sparc64 essentially does as well.  In fact, it uses an IRQ disable
> which is stronger  than local_irq_save in that it disables reception
> of CPU cross-calls as well.

Alpha does the switch in PALmode, which is never interruptable.


r~
-
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/