netdev - Re: 3.7.8/amd64 full interrupt hangs due to iwlwifi under big nfs copies out

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Message-ID: <1361392043.8579.14.camel@jlt4.sipsolutions.net>
Date:	Wed, 20 Feb 2013 21:27:23 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Marc MERLIN <marc@...lins.org>, David Miller <davem@...emloft.net>,
	Larry.Finger@...inger.net, bhutchings@...arflare.com,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 3.7.8/amd64 full interrupt hangs due to iwlwifi under big nfs
 copies out

On Wed, 2013-02-20 at 12:14 -0800, Eric Dumazet wrote:
> On Wed, 2013-02-20 at 20:58 +0100, Johannes Berg wrote:
> 
> > Sure: net/mac80211/rx.c ~line 1900, look for #ifndef
> > CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS.
> > 
> > > On x86 we should not doing anything.
> > 
> > We don't do anything if CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is
> > defined.
> 
> Thanks !

:-)
Hey, I introduced that config symbol back then for precisely this
reason ;-)

> BTW, comment is outdated, as it mentions __skb_push(), while
> its not used.

Oops, good point, now I wonder what it did actually refer to. Time to
dig in git history, I'll fix it.

johannes

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