linux-kernel - Re: [PATCH] memcg: deprecate memory.force

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: <20140512152507.GD1421@htj.dyndns.org>
Date:	Mon, 12 May 2014 11:25:07 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	lizefan@...wei.com, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, hannes@...xchg.org
Subject: Re: [PATCH] memcg: deprecate memory.force_empty knob

On Mon, May 12, 2014 at 05:20:15PM +0200, Michal Hocko wrote:
> On Mon 12-05-14 11:00:14, Tejun Heo wrote:
> > On Mon, May 12, 2014 at 04:58:03PM +0200, Michal Hocko wrote:
> > > @@ -4793,6 +4793,10 @@ static int mem_cgroup_force_empty_write(struct cgroup_subsys_state *css,
> > >  
> > >  	if (mem_cgroup_is_root(memcg))
> > >  		return -EINVAL;
> > > +	pr_info("%s (%d): memory.force_empty is deprecated and will be removed.",
> > > +			current->comm, task_pid_nr(current));
> > > +	pr_cont(" Let us know if you know if it needed in your usecase at");
> > > +	pr_cont(" linux-mm@...ck.org\n");
> > >  	return mem_cgroup_force_empty(memcg);
> > 
> > It probably would be way easier to just mark the knob with
> > CFTYPE_INSANE.
> 
> That would prevent from creating the file, right? I do not mind that but
> I would like to see people complaining before.

Oh sure, if you wanna see people complaining before the roll out of
unified hierarchy, but let's make sure it's also marked with
CFTYPE_INSANE.  It's easy to remove the flag afterwards.  The other
way isn't, so...

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/