linux-kernel - Re: [PATCH 09/12] irq: implement IRQ expecting

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: <87zkyro1xl.fsf@basil.nowhere.org>
Date:	Sat, 19 Jun 2010 10:35:02 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Tejun Heo <tj@...nel.org>, mingo@...e.hu, tglx@...utronix.de,
	bphilips@...e.de, yinghai@...nel.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	jeff@...zik.org, linux-ide@...r.kernel.org,
	stern@...land.harvard.edu, gregkh@...e.de, khali@...ux-fr.org
Subject: Re: [PATCH 09/12] irq: implement IRQ expecting

Arjan van de Ven <arjan@...radead.org> writes:

> On Sun, 13 Jun 2010 17:31:35 +0200
> Tejun Heo <tj@...nel.org> wrote:
>> + */
>> +void expect_irq(struct irq_expect *exp)
>
>
> I would like to suggest an (optional) argument to this with a duration
> within which to expect an interrupt....
>
> that way in the backend we can plumb this also into the idle handler
> for C state selection...

I'm not sure it's really that useful to power optimize
the lost interrupts polling case. It's just a last resort
fallback anyways and will be always less power efficient
because there will be unnecessary polls.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
--
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/