netdev - Re: [PATCH net-next] xen-netback: allocate xenvif arrays using vzalloc.

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Message-ID: <1383141242.4857.36.camel@edumazet-glaptop.roam.corp.google.com>
Date:	Wed, 30 Oct 2013 06:54:02 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Joby Poriyath <joby.poriyath@...rix.com>
Cc:	netdev@...r.kernel.org, wei.liu2@...rix.com,
	ian.campbell@...rix.com, xen-devel@...ts.xen.org,
	andrew.bennieston@...rix.com, david.vrabel@...rix.com,
	malcolm.crossley@...rix.com
Subject: Re: [PATCH net-next] xen-netback: allocate xenvif arrays using
 vzalloc.

On Wed, 2013-10-30 at 10:39 +0000, Joby Poriyath wrote:

> The net_device allocation rule {linux/Documentation/networking/netdevices.txt} states
> that net_device struct must be allocated using kmalloc.
> 
> Is this safe to do?

As long as the freeing path is aware of the possibility the memory is
either allocated with vmalloc() or kmalloc(), we are safe.


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