linux/include/net/netns
Eric Dumazet 5424ea2739 netns: get more entropy from net_hash_mix()
struct net are effectively allocated from order-1 pages on x86,
with one object per slab, meaning that the 13 low order bits
of their addresses are zero.

Once shifted by L1_CACHE_SHIFT, this leaves 7 zero-bits,
meaning that net_hash_mix() does not help spreading
objects on various hash tables.

For example, TCP listen table has 32 buckets, meaning that
all netns use the same bucket for port 80 or port 443.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-23 10:59:56 +09:00
..
can.h can: af_can: give struct holding the CAN per device receive lists a sensible name 2018-01-05 11:12:08 +01:00
conntrack.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
core.h sock: Hide unused variable when !CONFIG_PROC_FS. 2017-12-19 09:58:14 -05:00
dccp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
generic.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hash.h netns: get more entropy from net_hash_mix() 2018-06-23 10:59:56 +09:00
ieee802154_6lowpan.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipv4.h tcp: add tcp_comp_sack_nr sysctl 2018-05-18 11:40:27 -04:00
ipv6.h ipv6: sr: Compute flowlabel for outer IPv6 header of seg6 encap mode 2018-04-25 13:02:15 -04:00
mib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpls.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netfilter.h netfilter: don't allocate space for arp/bridge hooks unless needed 2018-01-08 18:01:11 +01:00
nftables.h netfilter: nf_tables: fix chain dependency validation 2018-06-01 09:46:22 +02:00
packet.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sctp.h sctp: add stream interleave enable members and sockopt 2017-12-11 11:23:04 -05:00
unix.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x_tables.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfrm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00