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From: Anton Blanchard <anton@samba.org>
To: David Miller <davem@davemloft.net>
Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org, miltonm@bga.com
Subject: Re: [PATCH] tcp: Fix sysctl_tcp_max_orphans when PAGE_SIZE != 4k
Date: Thu, 26 Aug 2010 10:38:34 +1000	[thread overview]
Message-ID: <20100826003834.GA17882@kryten> (raw)
In-Reply-To: <20100825.165759.27789477.davem@davemloft.net>


Hi Dave,

> Yeah, something like the following, Anton?

Thanks! I tested on a 512GB box. One thing:

# cat /proc/sys/net/ipv4/tcp_max_syn_backlog 
128

We probably want to use max():

> -	sysctl_max_syn_backlog = min(128, cnt / 256);
> +	sysctl_max_syn_backlog = max(128, cnt / 256);

With that change:

# cat /proc/sys/net/ipv4/tcp_max_orphans 
262144
# cat /proc/sys/net/ipv4/tcp_max_tw_buckets
262144
# cat /proc/sys/net/ipv4/tcp_max_syn_backlog 
2048


Tested-by: Anton Blanchard <anton@samba.org>

Anton

  reply	other threads:[~2010-08-26  0:39 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-25  7:16 Spurious "TCP: too many of orphaned sockets", unable to allocate sockets Anton Blanchard
2010-08-25  7:17 ` [PATCH] tcp: Fix sysctl_tcp_max_orphans when PAGE_SIZE != 4k Anton Blanchard
2010-08-25  7:39   ` Eric Dumazet
2010-08-25  7:59     ` David Miller
2010-08-25 17:50   ` Eric Dumazet
2010-08-25 23:57     ` David Miller
2010-08-26  0:38       ` Anton Blanchard [this message]
2010-08-26  3:53         ` David Miller
2010-08-26  6:36           ` Anton Blanchard
2010-08-26  4:45         ` Eric Dumazet
2010-08-26  5:15         ` [PATCH] tcp: fix three tcp sysctls tuning Eric Dumazet
2010-08-26  6:02           ` David Miller
2010-08-26  6:21             ` Eric Dumazet
2010-08-25  7:59 ` Spurious "TCP: too many of orphaned sockets", unable to allocate sockets David Miller
2010-08-25  8:20   ` David Miller
2010-08-25  8:47     ` Eric Dumazet
2010-08-25  9:28       ` David Miller

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