linux-kernel - Re: [PATCH] LinuxPPS (with new syscalls API)

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]

Date:	Wed, 11 Jul 2007 10:17:47 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] LinuxPPS (with new syscalls API) - new version

On Tue, 2007-07-10 at 18:38 +0200, Rodolfo Giometti wrote:
> On Tue, Jul 10, 2007 at 05:05:47PM +0100, David Woodhouse wrote:
> > 
> > I'm sure the version with 'volatile' will also be broken then. Sounds
> > like the right answer is to fix the locking.
> 
> But wish avoiding locking at all since this may delay the time stamp
> recording. We (the LinuxPPS guys) niticed that just a single
> instruction my degrade the time setting about 50%!
> 
> I avoid locking just using a pointer and setting it to a dummy
> structure when not used... is that wrong? :-o

Almost certainly (admittedly said without looking).

-- 
dwmw2

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/