On Wed, 25 Apr 2007, Hugh Dickins wrote: > SLUB gave me a NULL pointer dereference in slab_alloc(), in the > slab_lock(page) of its "Current cpuslab is acceptable" block: cpu > 1 had been looking at cpu_slab[2], which then went NULL beneath it. > Since new_slab() may reenable interrupts and sleep (when __GFP_WAIT), > we may get rescheduled on a different cpu: so need to reevaluate it.
Right. local_irq_save does not switch off preemption as I thought. Acked-by: Christoph Lameter <[EMAIL PROTECTED]> - 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/
