Re: [PATCH 09/17] netvm: Allow the use of __GFP_MEMALLOC by specific sockets

From: Mel Gorman <mgorman@suse.de>
Date: Thu, 17 May 2012 15:50:23 +0100

Allow specific sockets to be tagged SOCK_MEMALLOC and use
__GFP_MEMALLOC for their allocations. These sockets will be able to go
below watermarks and allocate from the emergency reserve. Such sockets
are to be used to service the VM (iow. to swap over). They must be
handled kernel side, exposing such a socket to user-space is a bug.

There is a risk that the reserves be depleted so for now, the
administrator is responsible for increasing min_free_kbytes as
necessary to prevent deadlock for their workloads.

[a.p.zijlstra@chello.nl: Original patches]
Signed-off-by: Mel Gorman <mgorman@suse.de>

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

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