From: David Miller <davem@davemloft.net>
To: dada1@cosmosbay.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] [NET] Size listen hash tables using backlog hint
Date: Wed, 18 Oct 2006 23:57:47 -0700 (PDT) [thread overview]
Message-ID: <20061018.235747.74746971.davem@davemloft.net> (raw)
In-Reply-To: <45371C8D.20603@cosmosbay.com>
From: Eric Dumazet <dada1@cosmosbay.com>
Date: Thu, 19 Oct 2006 08:34:53 +0200
> My main problem is being able to use a large hash table on big servers.
>
> With power-of two constraint, plus kmalloc max size constraint, we can use
> half the size we could.
Switch to vmalloc() at the kmalloc() cut-off point, just like
I did for the other hashes in the tree.
> Are you suggesting something like :
Not at all.
BTW, this all reminds me that we need to be careful that this
isn't allowing arbitrary users to eat up a ton of unswappable
ram. It's pretty easy to open up a lot of listening sockets :)
next prev parent reply other threads:[~2006-10-19 6:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-17 0:53 [PATCH] Bound TSO defer time (resend) John Heffner
2006-10-17 3:20 ` Stephen Hemminger
2006-10-17 4:18 ` John Heffner
2006-10-17 5:35 ` David Miller
2006-10-17 12:22 ` John Heffner
2006-10-19 3:39 ` David Miller
2006-10-17 12:58 ` [PATCH] [NET] Size listen hash tables using backlog hint Eric Dumazet Hi
2006-10-18 7:38 ` [PATCH] [NET] inet_peer : group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS Eric Dumazet
2006-10-18 16:35 ` [PATCH] [NET] reduce per cpu ram used for loopback stats Eric Dumazet
2006-10-18 17:00 ` [PATCH, resent] " Eric Dumazet
2006-10-19 3:53 ` David Miller
2006-10-19 3:53 ` [PATCH] " David Miller
2006-10-19 3:44 ` [PATCH] [NET] inet_peer : group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS David Miller
2006-10-19 10:57 ` Eric Dumazet
2006-10-19 15:45 ` [PATCH] [NET] One NET_INC_STATS() could be NET_INC_STATS_BH in tcp_v4_err() Eric Dumazet
2006-10-20 7:22 ` David Miller
2006-10-20 14:21 ` Arnaldo Carvalho de Melo
2006-10-20 7:28 ` [PATCH] [NET] inet_peer : group together avl_left, avl_right, v4daddr to speedup lookups on some CPUS David Miller
2006-10-19 3:31 ` [PATCH] [NET] Size listen hash tables using backlog hint David Miller
2006-10-19 4:54 ` Stephen Hemminger
2006-10-19 5:08 ` David Miller
2006-10-19 5:12 ` Eric Dumazet
2006-10-19 6:12 ` David Miller
2006-10-19 6:34 ` Eric Dumazet
2006-10-19 6:57 ` David Miller [this message]
2006-10-19 8:29 ` Eric Dumazet
2006-10-19 8:41 ` David Miller
2006-10-19 9:11 ` Eric Dumazet
2006-10-19 9:27 ` Eric Dumazet
2006-10-20 7:27 ` David Miller
2006-10-18 15:37 ` [PATCH] Bound TSO defer time (resend) Andi Kleen
2006-10-18 16:40 ` Stephen Hemminger
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