netdev - RE: [PATCH] rtnetlink: Fix problem with buffer allocation

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Message-ID: <C5551D9AAB213A418B7FD5E4A6F30A0702F96E22@ORSMSX106.amr.corp.intel.com>
Date:	Tue, 21 Feb 2012 21:56:14 +0000
From:	"Rose, Gregory V" <gregory.v.rose@...el.com>
To:	David Miller <davem@...emloft.net>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH] rtnetlink: Fix problem with buffer allocation

> -----Original Message-----
> From: David Miller [mailto:davem@...emloft.net]
> Sent: Tuesday, February 21, 2012 1:50 PM
> To: eric.dumazet@...il.com
> Cc: Rose, Gregory V; netdev@...r.kernel.org
> Subject: Re: [PATCH] rtnetlink: Fix problem with buffer allocation
> 
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Tue, 21 Feb 2012 22:48:16 +0100
> 
> > Thats going to hurt some setups (thousand of devices on a server).
> 
> This logic only triggers when the VF attribute is explicitly asked
> for.
> 
> > Also why are you using _rcu() variant here, we hold rtnl I presume ?
> 
> Because that's what I told him to use probably :-)  Indeed, I think
> we can use the non-RCU variant in this spot.

In rtnl_fill_ifinfo the code there uses hlist_for_each_entry_rcu() so I think that's why it got carried over here.  I can remove it.

- Greg

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