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From: Hagen Paul Pfeifer <hagen@jauu.net>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] socket: increase default maximum listen queue length
Date: Sun, 20 Mar 2011 12:39:21 +0100	[thread overview]
Message-ID: <20110320113921.GA3038@nuttenaction> (raw)
In-Reply-To: <1300609817.2831.56.camel@edumazet-laptop>

* Eric Dumazet | 2011-03-20 09:30:17 [+0100]:

>Hmm, real problem is not the 'maximum queue value', but the minimum one.
>
>If application says : listen(fd, 10), you are stuck.
>
>128 or 256 is way too small on some servers, where admin can tune
>in /etc/sysctl.conf :
>
>net.core.somaxconn = 8192
>net.ipv4.tcp_max_syn_backlog = 8192
>
>But application also needs to use : listen(fd, 8192)

I know Eric, I wrote the patch. ;-) The used naming goes like this:

The system limits (somaxconn & tcp_max_syn_backlog) specify a _maximum_, the
user cannot exceed this limit with listen(2). The backlog argument for listen
on the other hand specify a _minimum_. But the patch increased the default
maximum, therefore I named it in this way.

  parent reply	other threads:[~2011-03-20 11:39 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-20  1:50 [PATCH] socket: increase default maximum listen queue length Hagen Paul Pfeifer
2011-03-20  4:41 ` David Miller
2011-03-20 11:59   ` Hagen Paul Pfeifer
2011-03-20  8:30 ` Eric Dumazet
2011-03-20  9:04   ` Rémi Denis-Courmont
2011-03-20  9:36     ` Eric Dumazet
2011-03-20 11:39   ` Hagen Paul Pfeifer [this message]
2011-03-20 11:55     ` Eric Dumazet
2011-03-20 12:14       ` Hagen Paul Pfeifer
2011-03-20 23:04         ` [PATCH 1/2] " Hagen Paul Pfeifer
2011-03-20 23:04           ` [PATCH 2/2] socket: add minimum listen queue length sysctl Hagen Paul Pfeifer
2011-03-21  7:36             ` Eric Dumazet
2011-03-20 23:09           ` [PATCH 1/2] socket: increase default maximum listen queue length David Miller
2011-03-20 23:52             ` Hagen Paul Pfeifer
2011-03-21  0:18               ` David Miller
2011-03-20 23:57             ` Hagen Paul Pfeifer

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