netdev - Re: [PATCH net-next 0/2] tcp/dccp: better use of ephemeral ports

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20160211.114825.2144275138787010650.davem@davemloft.net>
Date:	Thu, 11 Feb 2016 11:48:25 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	edumazet@...gle.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 0/2] tcp/dccp: better use of ephemeral ports

From: Eric Dumazet <edumazet@...gle.com>
Date: Fri,  5 Feb 2016 18:08:56 -0800

> Big servers have bloated bind table, making very hard to succeed
> ephemeral port allocations, without special containers/namespace tricks.
> 
> This patch series extends the strategy added in commit 07f4c90062f8 
> ("tcp/dccp: try to not exhaust ip_local_port_range in connect()").
> 
> Since ports used by connect() are much likely to be shared among them,
> we give a hint to both bind() and connect() to keep the crowds separated
> if possible.
> 
> Of course, if on a specific host an application needs to allocate ~30000
> ports using bind(), it will still be able to do so. Same for ~30000 connect()
> to a unique 2-tuple (dst addr, dst port)
> 
> New implemetation is also more friendly to softirqs and reschedules.

I'm getting rejects on the second patch, please respin and repost.

Thanks Eric.