linux-kernel - Re: [PATCH] cgroupfs: create /sys/fs/cgroup to mount cgroupfs on

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <AANLkTi=OMaKuk+ReeqCfBGes76BjKYyUdqxPOQfH8EcZ@mail.gmail.com>
Date:	Mon, 26 Jul 2010 11:13:14 +0200
From:	Dhaval Giani <dhaval.giani@...il.com>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Greg KH <gregkh@...e.de>, Paul Menage <menage@...gle.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Lennart Poettering <lennart@...ttering.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Ben Blum <bblum@...rew.cmu.edu>,
	containers@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroupfs: create /sys/fs/cgroup to mount cgroupfs on

On Mon, Jul 26, 2010 at 11:12 AM, Kay Sievers <kay.sievers@...y.org> wrote:
> On Mon, Jul 26, 2010 at 11:08, Dhaval Giani <dhaval.lists@...gianis.in> wrote:
>> On Thu, Jul 22, 2010 at 8:36 PM, Greg KH <gregkh@...e.de> wrote:
>>> On Thu, Jul 22, 2010 at 11:31:07AM -0700, Paul Menage wrote:
>>>> On Thu, Jul 22, 2010 at 11:26 AM, Greg KH <gregkh@...e.de> wrote:
>>>> > We really shouldn't be asking userspace to create new root filesystems.
>>>> > So follow along with all of the other in-kernel filesystems, and provide
>>>> > a mount point in sysfs.
>>>> >
>>>> > For cgroupfs, this should be in /sys/fs/cgroup/  This change provides
>>>> > that mount point when the cgroup filesystem is registered in the kernel.
>>>>
>>>> But cgroups will typically have multiple mounts, with different
>>>> resource controllers/options on each mount. That doesn't really fit in
>>>> with this scheme.
>>>
>>> Really?  I see systems mounting it at /cgroups/ in the filesystem today.
>>> Where are you expecting it to be mounted at?
>>>
>>
>> Not really. It is getting mounted at /cgroups/<name of resource
>> controller>/ at a number of places. Keeping it in sysfs loses us a lot
>> of this flexibility. Unless you are ready to keep adding a new
>> mountpoint for each subsystem, it will not really work out in the long
>> term.
>
> As mentioned earlier in this thread, systemd already mounts a tmpfs at
> the cgroup mountpoint. We need only a single directory. This should
> not be an issue.
>

Ah ok. I am catching up with email after over 3 weeks :-). Missed all
this discussion. My apologies!

Dhaval
--
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/