netdev - [IPSEC] flow : NUMA aware hash table allocation

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Date:	Tue, 01 Jan 2008 13:44:15 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	"David S. Miller" <davem@...emloft.net>
CC:	Linux Netdev List <netdev@...r.kernel.org>
Subject: [IPSEC] flow : NUMA aware hash table allocation

Using __get_free_pages() has some drawbacks :

1) Not NUMA aware

2) 2^X page granularity :
On arches with big PAGE_SIZE, we waste some ram for each cpu.

(We currently use 1024 pointers, that is at most 8192 bytes, but
PAGE_SIZE can be 65536 for example : With say 64 possible cpus,
thats about 56*64 Kbytes that are wasted)

Using kmalloc_node() can help to solve these two points.

Signed-off-by: Eric Dumazet <dada1@...mosbay.com>

  net/core/flow.c |   15 +++++----------
  1 files changed, 5 insertions(+), 10 deletions(-)

View attachment "flow.patch" of type "text/plain" (887 bytes)