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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: David Ahern <dsahern@kernel.org>, netdev <netdev@vger.kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH v2 net 0/2] ipv4: avoid pathological hash tables
Date: Wed, 19 Jan 2022 02:04:11 -0800	[thread overview]
Message-ID: <20220119100413.4077866-1-eric.dumazet@gmail.com> (raw)

From: Eric Dumazet <edumazet@google.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


             reply	other threads:[~2022-01-19 10:04 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-19 10:04 Eric Dumazet [this message]
2022-01-19 10:04 ` [PATCH v2 net 1/2] ipv4: avoid quadratic behavior in netns dismantle Eric Dumazet
2022-01-19 10:04 ` [PATCH v2 net 2/2] ipv4: add net_hash_mix() dispersion to fib_info_laddrhash keys Eric Dumazet
2022-01-19 15:40   ` David Ahern
2022-01-19 18:24 ` [PATCH v2 net 0/2] ipv4: avoid pathological hash tables Jakub Kicinski

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