On 11/29, H. Peter Anvin wrote: > > On 11/29/2013 12:05 PM, Oleg Nesterov wrote: > > > > Can't we invalidate pte (so that any user will stuck in page fault), > > update the page(s), restore the pte and drop the locks? > > > > That would require a global TLB shootdown
Well, it is not really global, it is for mm_cpumask() and for good reason? And is it really worse than on_each_cpu(do_sync_core) and the usage of text_mutex? > (and wouldn't help > shared-memory code segments, if we care about that at all.) Well, I think this should only support the private mappings. > It also > means much bigger code ranges would be affected. Yes, this is true. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
