netdev - Re: [RFC 5/7] net: Add allocation flag to rtnl

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Message-ID: <1467950431.17638.6.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Fri, 08 Jul 2016 06:00:31 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Masashi Honma <masashi.honma@...il.com>
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	linux-wireless@...r.kernel.org, linux-rdma@...r.kernel.org,
	linux-audit@...hat.com, cluster-devel@...hat.com,
	davem@...emloft.net, johannes@...solutions.net,
	pablo@...filter.org, kaber@...sh.net, kadlec@...ckhole.kfki.hu,
	dledford@...hat.com, sean.hefty@...el.com,
	hal.rosenstock@...il.com, paul@...l-moore.com, eparis@...hat.com,
	zbr@...emap.net, pshelar@...ira.com, ccaulfie@...hat.com,
	teigland@...hat.com, bsingharora@...il.com
Subject: Re: [RFC 5/7] net: Add allocation flag to rtnl_unicast()

On Fri, 2016-07-08 at 12:15 +0900, Masashi Honma wrote:
=
> Thanks for comment.
> 
> I have selected GFP flags based on existing code.
> 
> I have selected GFP_ATOMIC in inet6_netconf_get_devconf() because
> skb was allocated with GFP_ATOMIC.

Point is : we should remove GFP_ATOMIC uses as much as we can.

Everytime we see one of them, we should think why it was added
and if this is really needed.

inet6_netconf_get_devconf() is a perfect example of one careless
GFP_ATOMIC usage

https://patchwork.ozlabs.org/patch/646291/