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: <4C15F4B7.5040601@gmail.com>
Date:	Mon, 14 Jun 2010 11:21:59 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Tejun Heo <tj@...nel.org>
CC:	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

On 06/13/2010 05:31 PM, Tejun Heo wrote:
> --- a/kernel/irq/spurious.c
> +++ b/kernel/irq/spurious.c
...

> @@ -25,9 +26,43 @@ enum {
>  	/* IRQ polling common parameters */
>  	IRQ_POLL_SLOW_INTV		= 3 * HZ,	/* not too slow for ppl, slow enough for machine */
>  	IRQ_POLL_INTV			= HZ / 100,	/* from the good ol' 100HZ tick */
> +	IRQ_POLL_QUICK_INTV		= HZ / 1000,	/* pretty quick but not too taxing */
>  
>  	IRQ_POLL_SLOW_SLACK		= HZ,
>  	IRQ_POLL_SLACK			= HZ / 1000,	/* 10% slack */
> +	IRQ_POLL_QUICK_SLACK		= HZ / 10000,	/* 10% slack */

Hi. These are zeros on most systems (assuming distros set HZ=100 and
250), what is their purpose then?

regards,
-- 
js
--
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/