netdev - Re: [PATCH RFC] pkt_sched: Remove smp_wmb() in qdisc

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:	Fri, 19 Dec 2008 18:18:51 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH RFC] pkt_sched: Remove smp_wmb() in qdisc_watchdog()

On Fri, 19 Dec 2008 11:41:25 +0000
Jarek Poplawski <jarkao2@...il.com> wrote:

> On Fri, Dec 19, 2008 at 11:30:47AM +0000, Jarek Poplawski wrote:
> ...
> > While implementing a TCQ_F_THROTTLED flag there was used an smp_wmb()
> > in qdisc_watchdog(), but since this flag is practically used only in
> > sch_netem(), and since it's not even clear what reordering is avoided
> 
> Hmm.. I forgot to mention sch_cbq(), but it doesn't use a barrier
> anyway.
> 
> Jarek P.

The barrier was copied from earlier version of tbf is unnecessary.
--
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