Re: [PATCH 1/2] nfnetlink: add netns support

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Alexey Dobriyan wrote:
> On Wed, Jan 13, 2010 at 02:42:00PM +0100, Patrick McHardy wrote:
>> Alexey Dobriyan wrote:
>>> On Wed, Jan 13, 2010 at 02:27:08PM +0100, Patrick McHardy wrote:
>>>> Alexey Dobriyan wrote:
>>>>> On Wed, Jan 13, 2010 at 02:02:33PM +0100, Patrick McHardy wrote:
>>>>>> Alexey Dobriyan wrote:
>>>>>>> +	struct sock		*nfnl;
>>>>>>> +	struct sock		*nfnl_stash;
>>>>>> Shouldn't this be contained in an ifdef(CONFIG_NETFILTER_NETLINK)
>>>>>> (_MODULE) ?
>>>>> No, otherwise you won't be able to start using, e. g., nfnetlink_log
>>>>> module on NETFILTER_NETLINK=n kernels without reboot.
>>>> You mean after enabling CONFIG_NETFILTER_NETLINK?
>>> Yes, and it can't be directly enabled, because it's hidden option.
>>>
>>>> That seems like a pretty poor argument, you have to do a reboot after
>>>> changing a lot of config options.
>>> It's still a step back if I add #ifdef and a regression if you ask me.
>>> The price is only two pointers per-netns.
>> Yes, I don't mind much, but I still think this is not an argument
>> at all. Whether you have to reboot after changing your configuration
>> has never been "stable" and we don't consider it when making changes.
> 
> Perhaps we should start considering it.
> 
> What's bool is bool and fair game.
> What's tristate better be fully tristate.

That's silly. Any configuration option is allowed to change
data structure layout, at which point you'll often need to
reboot.
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