On Tue, Apr 12, 2011 at 08:38:04PM -0500, Larry Finger wrote: > On 04/12/2011 04:22 PM, Johannes Stezenbach wrote: > > > >I don't think the allocation uses the MTU, rather rt2x00queue_alloc_rxskb() > >uses some hw specific constants. No idea if these can be reduced, > >but multi-page GFP_ATOMIC allocations can easily fail. > > That is likely. Those hw specific constants add up to 40 bytes, thus > the major part is actual buffer. That is set at 3840 bytes, thus I > don't understand why the request was order 1. An skb has quite a bit of overhead, there's full struct skb_shared_info inside, plus some padding. See dev_alloc_skb() -> __alloc_skb(). If think that pushes it above 4096 bytes. Johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
