linux-kernel - Re: [PATCH Resend] Expose do_timer CPU via sysctl to userspace as R/W

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]

Message-ID: <20140219195044.GZ14089@laptop.programming.kicks-ass.net>
Date:	Wed, 19 Feb 2014 20:50:44 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Henrik Austad <henrik@...tad.us>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Henrik Austad <haustad@...co.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH Resend] Expose do_timer CPU via sysctl to userspace as R/W

On Wed, Feb 19, 2014 at 08:43:55PM +0100, Henrik Austad wrote:
> The online-part should be taken care of by the cpu_present(), no?

No, cpu_present() only means there is a physical CPU present. It might
be offline.

See the comment in include/linux/cpumask.h
--
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/