linux-kernel - Re: [RFC PATCH 1/1] module: Make wait module's refcount to zero procedure as async

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Message-ID: <CAKi4VAJ5=zsJzyQNprchB2wnwh0+gg2oNP2PFsa4Lcw++3mSig@mail.gmail.com>
Date:	Thu, 12 Sep 2013 23:08:15 -0300
From:	Lucas De Marchi <lucas.de.marchi@...il.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Peter Chen <peter.chen@...escale.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/1] module: Make wait module's refcount to zero
 procedure as async

On Thu, Sep 12, 2013 at 9:30 PM, Rusty Russell <rusty@...tcorp.com.au> wrote:
> Peter Chen <peter.chen@...escale.com> writes:
>> Currently, if module's refcount is not zero during the unload,
>> it waits there until the user decreases that refcount.
>
> Hi Peter,
>
>         In practice userspace uses O_NONBLOCK.  In fact, I've been
> thinking of removing the blocking case altogether, since it's not really
> what people want.
>
> That would solve your problem and make the code simpler.  Thoughts?

I'm all in favor of this. It's been almost 1 year it's deprecated in
kmod and if anyone tries to use we force a 10s delay on module
removal. So far nobody complained.

Lucas De Marchi
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