netdev - Re: [PATCH net-next-2.6] rps: shortcut net_rps

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:	Tue, 20 Apr 2010 07:56:04 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Tom Herbert <therbert@...gle.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next-2.6] rps: shortcut net_rps_action()

On Mon, Apr 19, 2010 at 11:07 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> +
> +               /* Send pending IPI's to kick RPS processing on remote cpus. */
> +               while (remqueue) {
> +                       struct softnet_data *next = remqueue->rps_ipi_next;
> +                       if (cpu_online(remqueue->cpu))
> +                               __smp_call_function_single(remqueue->cpu,
> +                                                          &remqueue->csd, 0);
> +                       remqueue = next;
> +               }

It seems you prefetch rps_ipi_next. I think it isn't necessary, as the
list should be short. If you insist on this, is the macro prefetch()
better?

-- 
Regards，
Changli Gao(xiaosuo@...il.com)