linux-kernel - Re: [PATCH]sched: stop hrtick timer if running task is switching from fair scheduling class to another

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] [day] [month] [year] [list]

Date:	Wed, 04 Jan 2012 13:30:29 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Kirill Tkhai <kirill.tkhai@...il.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Kirill Tkhai <tkhai@...dex.ru>
Subject: Re: [PATCH]sched: stop hrtick timer if running task is switching
 from fair scheduling class to another

On Mon, 2011-12-26 at 16:42 +0100, Oleg Nesterov wrote:
> 
> Peter, Ingo, does this code really work? SCHED_FEAT(HRTICK) == 0
> by default, and afaics you can't change it without CONFIG_SCHED_DEBUG.
> 
> 

No its broken. Maybe I should've removed it, but I've always been
meaning to fix it since SCHED_DEADLINE actually needs it, but alas.
-ENOTIME and no urgency need have conspired against it.
--
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/