Re: [Xen-devel] [PATCH v2 net-next] net: extend net_device allocation to vmalloc()

[David Miller <davem@xxxxxxxxxxxxx>]

From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Date: Wed, 30 Oct 2013 13:10:44 -0700

> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> Joby Poriyath provided a xen-netback patch to reduce the size of
> xenvif structure as some netdev allocation could fail under
> memory pressure/fragmentation.
> 
> This patch is handling the problem at the core level, allowing
> any netdev structures to use vmalloc() if kmalloc() failed.
> 
> As vmalloc() adds overhead on a critical network path, add __GFP_REPEAT
> to kzalloc() flags to do this fallback only when really needed.
> 
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Reported-by: Joby Poriyath <joby.poriyath@xxxxxxxxxx>
> Cc: Ben Hutchings <bhutchings@xxxxxxxxxxxxxx>
> ---
> v2: change the Documentation to point to alloc_netdev_mqs()
>     instead of kmalloc()/vzalloc(), from Ben

Looks good, applied, thanks Eric.

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