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

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Message-ID: <20130527224149.GA4384@electric-eye.fr.zoreil.com>
Date:	Tue, 28 May 2013 00:41:49 +0200
From:	Francois Romieu <romieu@...zoreil.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,
	riel@...hat.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

atomlin@...hat.com <atomlin@...hat.com> :
[...]
> 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.

Linux VM may be perfect but device drivers do stupid things.

Please don't paper over it just because some shit ends in your backyard.

-- 
Ueimor
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