netdev - Re: [PATCH net-next] sock: don't enable netstamp for af

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: <20151027101157.GA1850@netboy>
Date:	Tue, 27 Oct 2015 11:11:58 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] sock: don't enable netstamp for af_unix sockets

On Mon, Oct 26, 2015 at 02:32:59PM +0100, Hannes Frederic Sowa wrote:
> On Mon, Oct 26, 2015, at 14:19, Richard Cochran wrote:
> > On Mon, Oct 26, 2015 at 01:51:37PM +0100, Hannes Frederic Sowa wrote:
> > > netstamp_needed is toggled for all socket families if they request
> > > timestamping. But some protocols don't need the lower-layer timestamping
> > > code at all. This patch starts disabling it for af-unix.
> > 
> > What problem is this patch trying to solve?
> 
> netstamp_needed is a static-key which enables timestamping code in the
> networking stack receive functions for every packet, while it is not
> needed for AF_UNIX/LOCAL. So it is merely a small performance
> enhancement.

Are there any numbers that show the effect of this enhancement?

Thanks,
Richard
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html