net: extend net_device allocation to vmalloc()
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@google.com> Reported-by:
Joby Poriyath <joby.poriyath@citrix.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
b397f999
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