linux-kernel - Re: [PATCH 2/2] cgroup: Walk task list under tasklist_lock in cgroup_enable_task_cg

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]

Date:	Tue, 21 Feb 2012 17:06:23 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Mandeep Singh Baines <msb@...omium.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Li Zefan <lizf@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] cgroup: Walk task list under tasklist_lock in
 cgroup_enable_task_cg_list

On Wed, Feb 22, 2012 at 02:04:34AM +0100, Frederic Weisbecker wrote:
> > Guys, this is one time thing.  It happens *once* after boot and we're
> > already holding exclusive lock.  There's no reason to optimize this at
> > all.  Let's just keep it simple.
> 
> For now I agree. But one day the real time guys might eye that thing.

If the latency issue ever comes up, I think the right thing to do is
just disable the lazy optimization.  ie. Just chain tasks from the
beginning.

Thanks.

-- 
tejun
--
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/