Re: [PATCH 13/17] netvm: Set PF_MEMALLOC as appropriate during SKBprocessing

[David Miller]

From: Mel Gorman <mgorman@xxxxxxx>
Date: Thu, 17 May 2012 15:50:27 +0100

> In order to make sure pfmemalloc packets receive all memory
> needed to proceed, ensure processing of pfmemalloc SKBs happens
> under PF_MEMALLOC. This is limited to a subset of protocols that
> are expected to be used for writing to swap. Taps are not allowed to
> use PF_MEMALLOC as these are expected to communicate with userspace
> processes which could be paged out.
> 
> [a.p.zijlstra@xxxxxxxxx: Ideas taken from various patches]
> [jslaby@xxxxxxx: Lock imbalance fix]
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>

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