From: Octavian Purdila <opurdila@ixiacom.com>
To: Cong Wang <amwang@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Eric Dumazet <eric.dumazet@gmail.com>,
linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
Neil Horman <nhorman@tuxdriver.com>,
linux-sctp@vger.kernel.org, David Miller <davem@davemloft.net>
Subject: Re: [RFC Patch] net: reserve ports for applications using fixed port numbers
Date: Thu, 4 Feb 2010 14:44:01 +0200 [thread overview]
Message-ID: <201002041444.01897.opurdila@ixiacom.com> (raw)
In-Reply-To: <4B6A3DBA.1000706@redhat.com>
On Thursday 04 February 2010 05:23:38 you wrote:
> > I think it might be useful to allow setting individual ports as reserved,
> > not only ranges, for example by using a bitmap.
>
> This is a good idea, but I am not sure if this will be overkill? :-/
> Also, using bitmap is not friendly to sysctl interface, I am afraid.
>
My concern is that we can have multiple applications that require a fixed port
and if those ports are significantly apart we will decrease the port range
available for connect. And that will hurt the rate of which new connections
can be opened.
As for the sysctl interface I agree, I don't think it is even possible to
cleanly use a bitmap through sysctl.
The options I see are either enhance sysctl to support bitmaps or use a
dedicated /proc/net entry.
I want to give this a try, which one do you people think is better?
next prev parent reply other threads:[~2010-02-04 12:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-03 4:30 Amerigo Wang
2010-02-03 4:39 ` Eric Dumazet
2010-02-03 5:15 ` Cong Wang
2010-02-03 11:12 ` Octavian Purdila
2010-02-04 3:23 ` Cong Wang
2010-02-04 12:44 ` Octavian Purdila [this message]
2010-02-04 17:41 ` David Miller
2010-02-04 18:15 ` Octavian Purdila
2010-02-04 18:21 ` David Miller
2010-02-04 21:45 ` Tetsuo Handa
2010-02-04 21:56 ` David Miller
2010-02-05 0:41 ` Tetsuo Handa
2010-02-05 1:05 ` Octavian Purdila
2010-02-05 6:01 ` Cong Wang
2010-02-05 12:28 ` Octavian Purdila
2010-02-05 4:45 ` Cong Wang
2010-02-05 12:05 ` Octavian Purdila
2010-02-08 3:21 ` Cong Wang
2010-02-08 16:51 ` Octavian Purdila
2010-02-05 7:11 ` Bart Van Assche
2010-02-05 7:25 ` Cong Wang
2010-02-05 9:08 ` [RFC Patch] net: reserve ports for applications using fixed portnumbers Tetsuo Handa
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