linux-kernel - Re: [Patch v2] skbuff: Hide GFP_ATOMIC page allocation failures for dropped packets

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Message-ID: <51A39A3F.8080903@redhat.com>
Date:	Mon, 27 May 2013 13:39:11 -0400
From:	Rik van Riel <riel@...hat.com>
To:	atomlin@...hat.com
CC:	netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
	pshelar@...ira.com, mst@...hat.com, alexander.h.duyck@...el.com,
	aquini@...hat.com, sergei.shtylyov@...entembedded.com,
	linux-kernel@...r.kernel.org
Subject: Re: [Patch v2] skbuff: Hide GFP_ATOMIC page allocation failures for
 dropped packets

On 05/26/2013 04:19 PM, atomlin@...hat.com wrote:
> From: Aaron Tomlin <atomlin@...hat.com>
>
> Since v1:
>   - Removed unnecessary parentheses
>
> ---8<---
>
> Failed GFP_ATOMIC allocations by the network stack result in dropped
> packets, which will be received on a subsequent retransmit, and an
> unnecessary, noisy warning with a kernel backtrace.
>
> These warnings are harmless, but they still cause users to panic and
> file bug reports over dropped packets. It would be better to hide the
> failed allocation warnings and backtraces, and let retransmits handle
> dropped packets quietly.

Yes please. Getting memory management bug reports for
dropped network packets got old years ago.  Lets get
rid of those messages.

> Signed-off-by: Aaron Tomlin <atomlin@...hat.com>

Reviewed-by: Rik van Riel <riel@...hat.com>

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