netdev - [PATCH v2 net 0/2] ipv4: avoid pathological hash tables

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 19 Jan 2022 02:04:11 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     David Ahern <dsahern@...nel.org>, netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net 0/2] ipv4: avoid pathological hash tables

From: Eric Dumazet <edumazet@...gle.com>

This series speeds up netns dismantles on hosts
having many active netns, by making sure two hash tables
used for IPV4 fib contains uniformly spread items.

v2: changed second patch to add fib_info_laddrhash_bucket()
    for consistency (David Ahern suggestion).

Eric Dumazet (2):
  ipv4: avoid quadratic behavior in netns dismantle
  ipv4: add net_hash_mix() dispersion to fib_info_laddrhash keys

 net/ipv4/fib_semantics.c | 65 ++++++++++++++++++++--------------------
 1 file changed, 32 insertions(+), 33 deletions(-)

-- 
2.34.1.703.g22d0c6ccf7-goog