From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Larry Woodman <lwoodman@redhat.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: repost - RFC [Patch] Remove "please try 'cgroup_disable=memory' option if you don't want memory cgroups" printk at boot time.
Date: Wed, 21 Apr 2010 09:25:02 +0900 [thread overview]
Message-ID: <20100421092502.787371b5.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <1271773587.28748.134.camel@dhcp-100-19-198.bos.redhat.com>
On Tue, 20 Apr 2010 10:26:27 -0400
Larry Woodman <lwoodman@redhat.com> wrote:
> Re-posting, cc'ing linux-mm as requested:
>
> We are considering removing this printk at boot time from RHEL because
> it will confuse customers, encourage them to change the boot parameters
> and generate extraneous support calls. Its documented in
> Documentation/kernel-parameters.txt anyway. Any thoughts???
>
> Larry Woodman
>
For RHEL, I agree removing the message makes sense.
But I'm unsure that small machine users, who never use memcg, can notice some
amount of memory are eaten at boot time.
Many distro tends to enable memcg by default and consume memory.
printk(KERN_INFO "allocated %ld bytes of page_cgroup\n", total_usage);
- printk(KERN_INFO "please try 'cgroup_disable=memory' option if you"
- " don't want memory cgroups\n");
Hmm.
printk(KERN_INFO "If you don't want page_cgroup,
you can disable this by boot option, cgroup_disable=memory".)
My biggest concern is that we don't have man(5) cgroup as other file systems.
If we have man(5), the best place for this kind of information will be it.
I think most of users will never see kernel-parameter.txt ..
If usual distros are shipped with man(5) cgroup, I agree removing
this in upstream.
(We have man pages for libcgroup but not man(5) for cgroup file system.)
I'm sorry if I don't notice that the latest man package has cgroup section.
Bye,
-Kame
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2010-04-21 0:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-20 14:26 Larry Woodman
2010-04-21 0:25 ` KAMEZAWA Hiroyuki [this message]
2010-04-21 0:56 ` Li Zefan
2010-04-21 0:59 ` KAMEZAWA Hiroyuki
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100421092502.787371b5.kamezawa.hiroyu@jp.fujitsu.com \
--to=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lwoodman@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox