linux-kernel - Re: [PATCH 2/4] pidns: Call pid_ns_prepare_proc from create_pid

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Message-ID: <4D46C55C.1050200@free.fr>
Date:	Mon, 31 Jan 2011 15:21:16 +0100
From:	Daniel Lezcano <daniel.lezcano@...e.fr>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	akpm@...ux-foundation.org, ebiederm@...ssion.com,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, clg@...ibm.com
Subject: Re: [PATCH 2/4] pidns: Call pid_ns_prepare_proc from	create_pid_namespace

On 01/31/2011 03:02 PM, Oleg Nesterov wrote:
> On 01/31, Daniel Lezcano wrote:
>> On 01/31/2011 02:22 PM, Oleg Nesterov wrote:
>>> On 01/31, Daniel Lezcano wrote:
>>>> @@ -96,6 +97,9 @@ static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_p
>>>>    	for (i = 1; i<   PIDMAP_ENTRIES; i++)
>>>>    		atomic_set(&ns->pidmap[i].nr_free, BITS_PER_PAGE);
>>>>
>>>> +	if (pid_ns_prepare_proc(ns))
>>>> +		goto out_free_map;
>>>> +
>>>>    	return ns;
>>> This is not right, afaics. I already sent the similar patches, but
>>> they were ignored ;)
>>>
>>> Please see http://marc.info/?l=linux-kernel&m=127697484000334
>>>
>>> If pid_ns_prepare_proc() fails we shouldn't blindly return ENOMEM
>>> and, more importantly, we need put_pid_ns(parent_ns).
>> Oh, ok. Right. Thanks for the pointer.
>>
>> Are you ok if I replace the patch 2/4 with your patch ?
> My patch depends on 1/4, http://marc.info/?l=linux-kernel&m=127697468632667
>
> Your change looks very similar to 1/4 + 3/4. Just fix the problem
> in create_pid_namespace(), no need to replace.

Ok, will do.

Thanks Oleg.

   -- Daniel

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