netdev - Re: Subject: [PATCH] net/ipv6: Use GFP

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Message-ID: <1275254298.2472.26.camel@edumazet-laptop>
Date:	Sun, 30 May 2010 23:18:18 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Julia Lawall <julia@...u.dk>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: Subject: [PATCH] net/ipv6: Use GFP_ATOMIC when a lock is held

Le dimanche 30 mai 2010 à 23:09 +0200, Julia Lawall a écrit :

> could exit with success without the kzalloc ever being called.  If the 
> kzalloc is moved up, it could fail and then it returns immediately without 
> executing the loop.  A solution could be to leave the NULL test on p where 
> it is, and only move up the kzalloc.  Or perhaps the change in behavior 
> doesn't matter?

If a GFP_KERNEL allocation fails, we are in a big trouble anyway :)

GFP_ATOMIC are more problematic in this area :)



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