On Tue, 12 Dec 2006, Paul Jackson wrote: > Christoph wrote: > > + if (local_flags & __GFP_WAIT) > > + local_irq_enable(); > > + kmem_flagcheck(cache, flags); > > obj = kmem_getpages(cache, flags, -1); > > + if (local_flags & __GFP_WAIT) > > + local_irq_disable(); > > This seems strange to me. I am surprised that it is ok for a routine > that is called with irq's disabled, to enable them momentarilly.
The slab itself disables the irq. In this case the slab function is was called irqs enabled and we forgot to reenable interrupts before calling kmem_getpages(). > I'd have thought the caller of this routine, who called it with irq's > disabled, would expect irq's to remain disabled across the entire call. Irqs only stay disabled if GFP_ATOMIC is passed to the slab function. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
