linux-kernel - Re: [PATCH 1/1] SGI X86 UV: Provide a System Activity Indicator driver

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: <20081002083700.GB19993@atrey.karlin.mff.cuni.cz>
Date:	Thu, 2 Oct 2008 10:37:00 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Mike Travis <travis@....com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>, rpurdie@...ys.net,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 1/1] SGI X86 UV: Provide a System Activity Indicator	driver

> Pavel Machek wrote:
> >> Another relevant point is that I will be adding a bit more functionality
> >> to disable the timer interrupt on truly "idle" cpus (like have been idle
> >> for some amount of seconds).  We would then use the "exit from idle"
> >> callback to reestablish the timer interrupt.  [This would allow them to
> >> enter power down states if appropriate.]
> > 
> > Should you look at nohz instead of reinventing it? 
> 
> Thanks, I did look at it.  Quite complex.  Maybe I'm missing something
> but I don't see how it fits in?  Are you saying I should be using

I seen your remark above about disabling timer interrupt on idle
cpus. That's exactly nohz functionality, right? Maybe I misunderstood
you and you meant "my monitoring interrupt" and not "generic system
timer interrupt"?

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
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/