linux-ext4 - Re: container disk quota

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Date:	Sun, 3 Jun 2012 09:47:56 +0400
From:	Kirill Korotaev <dev@...allels.com>
To:	"jeff.liu@...cle.com" <jeff.liu@...cle.com>
CC:	Serge Hallyn <serge.hallyn@...onical.com>,
	"tytso@....edu" <tytso@....edu>,
	"tinguely@....com" <tinguely@....com>,
	"containers@...ts.linux-foundation.org" 
	<containers@...ts.linux-foundation.org>,
	"david@...morbit.com" <david@...morbit.com>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
	"hch@...radead.org" <hch@...radead.org>,
	"bpm@....com" <bpm@....com>,
	"christopher.jones@...cle.com" <christopher.jones@...cle.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Jan Kara <jack@...e.cz>, "tm@....ma" <tm@....ma>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"chris.mason@...cle.com" <chris.mason@...cle.com>
Subject: Re: container disk quota


On Jun 3, 2012, at 08:23 , Jeff Liu wrote:

> Hi Kirill,
> 
> On 06/02/2012 11:21 PM, Kirill Korotaev wrote:
> 
>>>>>> 
>>>>>> Not having looked closely at the original patchset, let me ask - is this
>>>>>> feature going to be a freebie with Eric's usernamespace patches?
>>>>> 
>>>>> It we can reach a consensus to bind quota on mount namespace for
>>>>> container or other things maybe.
>>>> 
>>>> 1. OpenVZ doesn't use mount namespaces and still has quotas per container.
>>> 
>>> AFAICS, OpenVZ has self-released quota tools to supply this feature.
>> 
>> but standard quota tools work inside container w/o any modifications.
>> This is very important for us, cause we run unmodified distros inside.
> 
> Yes, am agree.
> I can work out a new patches regarding quota tools based on mount namespace w/o any modification.

Jeff, why do you need fs namespace for quotas? OpenVZ works w/o it.
It sounds as too strict use case limitation. Or do I understand your patchset description wrong?

Thanks,
Kirill

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