From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Date: Fri, 10 Jul 2009 16:02:47 +0800 > On Fri, Jul 10, 2009 at 04:00:17PM +0800, Wu Fengguang wrote: >> >> The (sk_allocation & ~__GFP_WAIT) cases should be rare, but I guess >> the networking code shall do it anyway, because sk_allocation defaults >> to GFP_KERNEL. It seems that currently the networking code simply uses >> a lot of GFP_ATOMIC, do they really mean "I cannot sleep"? > > Yep because they're done from softirq context. Yes, this is the core issue. All of Wu's talk about how "GFP_ATOMIC will wake up kswapd and therefore can succeed just as well as GFP_KERNEL" is not relevant, because GFP_ATOMIC means sleeping is not allowed. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
