Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOCreserves

[David Miller]

From: Mel Gorman <mgorman@xxxxxxx>
Date: Thu, 17 May 2012 15:50:24 +0100

> Change the skb allocation API to indicate RX usage and use this to fall
> back to the PFMEMALLOC reserve when needed. SKBs allocated from the
> reserve are tagged in skb->pfmemalloc. If an SKB is allocated from
> the reserve and the socket is later found to be unrelated to page
> reclaim, the packet is dropped so that the memory remains available
> for page reclaim. Network protocols are expected to recover from this
> packet loss.
> 
> [davem@xxxxxxxxxxxxx: Use static branches, coding style corrections]
> [a.p.zijlstra@xxxxxxxxx: Ideas taken from various patches]
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
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