Re: kernel 3.2.27 on arm: WARNING: at mm/page_alloc.c:2109 __alloc_pages_nodemask+0x1d4/0x68c()

Hugh Dickins [off-list ref] :

[ Cc'ing original mail to netdev as the problem may be recognized there ]

[...]

Francois is right that a GFP_ATOMIC allocation from pskb_expand_head()
is failing, which can easily happen, and cause your "failed to reallocate
TX buffer" errors; but it's well worth looking up what's actually on
lines 2108 and 2109 of mm/page_alloc.c in 3.2.27:

	if (order >= MAX_ORDER) {
		WARN_ON_ONCE(!(gfp_mask & __GFP_NOWARN));

You are right. The wifi Tx path error is not related.

I overlooked it was using SLUB btw.

That was probably not a sane allocation request, it has gone out of range:
maybe the skb header is even corrupted.  If you're lucky, it might be
something that netdev will recognize as already fixed.

Afaics nothing related to mv643xx_eth.c, nor pskb_expand_head nor
ip6_forward, at least nothing trivially close. Eric may provide a
better answer.

-- 
Ueimor