linux-kernel - Re: [RFC/PATCH] cpuset: cpuset irq affinities

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: <20080229190223.GA17820@elte.hu>
Date:	Fri, 29 Feb 2008 20:02:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Oleg Nesterov <oleg@...sign.ru>,
	Steven Rostedt <rostedt@...dmis.org>,
	Paul Jackson <pj@....com>,
	Max Krasnyanskiy <maxk@...lcomm.com>,
	linux-kernel@...r.kernel.org, David Rientjes <rientjes@...gle.com>
Subject: Re: [RFC/PATCH] cpuset: cpuset irq affinities


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> @@ -174,11 +174,20 @@ struct irq_desc {
>  #ifdef CONFIG_PROC_FS
>  	struct proc_dir_entry	*dir;
>  #endif
> +#ifdef CONFIG_CPUSETS
> +	struct cpuset		*cs;
> +#endif

i like this approach - it makes irqs more resource-alike and attaches 
them to a specific resource control group.

So if /cgroup/boot is changed to have less CPUs then the "default" irqs 
move along with it.

but if an isolated RT domain has specific irqs attached to it (say the 
IRQ of some high-speed data capture device), then the irqs would move 
together with that domain.

irqs are no longer a bolted-upon concept, but more explicitly managed.

[ If you boot-test it and if Paul agrees with the general approach then
  i could even apply it to sched-devel.git ;-) ]

	Ingo
--
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/