linux-kernel - Re: [tip:sched/core] sched: Add 'autogroup' scheduling feature: automated per session task groups

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: <1292863193.19476.9.camel@marge.simson.net>
Date:	Mon, 20 Dec 2010 17:39:53 +0100
From:	Mike Galbraith <efault@....de>
To:	Bharata B Rao <bharata.rao@...il.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, mingo@...hat.com,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	mathieu.desnoyers@...icios.com, torvalds@...ux-foundation.org,
	pjt@...gle.com, markus@...ppelsdorf.de, tglx@...utronix.de,
	oleg@...hat.com, mingo@...e.hu, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched: Add 'autogroup' scheduling feature:
 automated per session task groups

On Mon, 2010-12-20 at 21:16 +0530, Bharata B Rao wrote:
> On Mon, Dec 20, 2010 at 6:49 PM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> > On Mon, 2010-12-20 at 18:38 +0530, Bharata B Rao wrote:
> >> The autogroup patchset removes the display of cgroup name from
> >> sched_debug output.
> >
> > Hrmph.. that wasn't supposed to happen, care to send a patch to fix that
> > up?
> 
> There are two aspects here:
> 
> - Printing cgroup name for per-CPU cfs_rqs shouldn't be affected by
>   autogroup and the old code should work here.
> - Printing cgroup name for tasks depends on task_group(), which has
> been changed by autogroup patch. I haven't really looked deep into
> autogroup patch, but from whatever I can gather, Mike had a reason
> to remove this bit from sched_debug. The task groups created for
> autogroups don't have cgroups associated with them and hence no
> dentries and hence no pathnames.

Mike didn't remove it, but _was_ supposed to get around to it.

> I guess we could do fix this as shown in the attached patch.


+#ifdef CONFIG_CGROUP_SCHED
+	{
+		char path[64];
+

...

+#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)
+	char path[128];

 
One reason it was removed was path[64/128].

	-Mike

--
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/