linux-kernel - Re: Revert "gro: Fix legacy path napi

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Message-Id: <20090326.005927.175146349.davem@davemloft.net>
Date:	Thu, 26 Mar 2009 00:59:27 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	mingo@...e.hu, r.schwebel@...gutronix.de,
	torvalds@...ux-foundation.org, blaschka@...ux.vnet.ibm.com,
	tglx@...utronix.de, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: Revert "gro: Fix legacy path napi_complete crash",

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Wed, 25 Mar 2009 20:08:40 +0800

> GRO: Disable GRO on legacy netif_rx path
> 
> When I fixed the GRO crash in the legacy receive path I used
> napi_complete to replace __napi_complete.  Unfortunately they're
> not the same when NETPOLL is enabled, which may result in us
> not calling __napi_complete at all.
> 
> What's more, we really do need to keep the __napi_complete call
> within the IRQ-off section since in theory an IRQ can occur in
> between and fill up the backlog to the maximum, causing us to
> lock up.
> 
> Since we can't seem to find a fix that works properly right now,
> this patch reverts all the GRO support from the netif_rx path.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, and will push to -stable.
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