On Mon, 2012-04-09 at 13:58 -0500, Larry Finger wrote: > As it happens with both iwlwifi and e1000e, it seems to be a problem further up > the food chain. > > I don't know much about iwlwifi, but loading it with the module parameter > "amsdu_size_8K=0" seems to select 4K rather than 8K buffers. That will hurt > performance, but it should fix the memory fragmentation. There have also been > some problems with aggregation that are fixed by setting the option "11n_disable=3". I think Marc posted stack traces showing problem on transmit side. 09:44:12 [<ffffffff810ba394>] ? __alloc_pages_nodemask+0x6b2/0x726 09:44:12 [<ffffffff810e9081>] ? kmem_getpages+0x4c/0xd9 09:44:12 [<ffffffff810e9081>] ? kmem_getpages+0x4c/0xd9 09:44:12 [<ffffffff810ea421>] ? fallback_alloc+0x123/0x1c2 09:44:12 [<ffffffff8127daae>] ? pskb_expand_head+0xe0/0x24a 09:44:12 [<ffffffff810ea923>] ? __kmalloc+0xba/0x112 09:44:12 [<ffffffff8127daae>] ? pskb_expand_head+0xe0/0x24a 09:44:12 [<ffffffffa07a81c0>] ? ieee80211_skb_resize+0x64/0x9d [mac80211] 09:44:12 [<ffffffffa07aa087>] ? ieee80211_subif_start_xmit+0x68e/0x80c [mac80211] 09:44:12 [<ffffffffa07922c8>] ? ieee80211_tx_status_irqsafe+0x2e/0x7f [mac80211] 09:44:12 [<ffffffff812877f3>] ? dev_hard_start_xmit+0x3fc/0x543 09:44:12 [<ffffffff81070551>] ? arch_local_irq_save+0x11/0x17 09:44:12 [<ffffffff8129da01>] ? sch_direct_xmit+0x5e/0x12f 09:44:12 [<ffffffff8129dbc9>] ? __qdisc_run+0xf7/0x10f I dont really understand how it can happen, with MTU=1500 -- 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
