Messages in this thread | | | Date | Thu, 1 Apr 2010 10:48:59 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: RFC [Patch] Remove "please try 'cgroup_disable=memory' option if you don't want memory cgroups" printk at boot time. |
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On Wed, 31 Mar 2010 13:57:46 -0400 Rik van Riel <riel@redhat.com> wrote:
> On 03/31/2010 11:54 AM, Larry Woodman wrote: > > On Wed, 2010-03-31 at 11:28 -0400, Larry Woodman wrote: > >> 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??? > > Yeah, that is a strange boot message... > > Acked-by: Rik van Riel <riel@redhat.com> > please CC linux-mm and maintainers.
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
It have been there for a year and I think memory usage by page_cgroup will not surprise linux kernel users, more.
Assume x86-32.
RHEL allows amount of memory up to 16G, right?
without memcg: memmap uses 32bytes * 16G/4k = 128M. with memcg: memmap+page_cgroup uses (32+20) bytes * 16G/4k = 208M.
I thought this may cause OOM in ZONE_NORMAL. Then, I added it when I wrote original patch. This kind of memory eater can cause trouble when it pops up suddenly. But I think 'one year' can be an excuse.
Thanks, -Kame
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