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Date:      Sun, 25 Nov 2012 13:48:23 +0000
From:      Attilio Rao <attilio@freebsd.org>
To:        Pawel Jakub Dawidek <pjd@freebsd.org>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Adrian Chadd <adrian@freebsd.org>, Giovanni Trematerra <giovanni.trematerra@gmail.com>, freebsd-arch@freebsd.org
Subject:   Re: [RFQ] make witness panic an option
Message-ID:  <CAJ-FndDxTf3pEQ5S5TyJTh3rDSnErcsvZzGwyWwChD_d81uVoQ@mail.gmail.com>
In-Reply-To: <20121125134743.GK1460@garage.freebsd.pl>
References:  <CAJ-Vmo=i=Amo_QqHi4GnGie0Gc0YnK3XaRKjvBO-=SFboFYPmA@mail.gmail.com> <CACfq090EiEiG7Ou2ZMUafWN6GLT9RNK1Q4tiOHnOBWe8GYJDjA@mail.gmail.com> <CAJ-VmonE3myRyeZ%2BAe0ZOXf7wKvC44rRVkFfDaEwnk8C-=5uoA@mail.gmail.com> <CAJ-FndCZPand_rx_uXUeetGMUZu1syGwjdFS7jv9BwdzuXvXOA@mail.gmail.com> <20121125123920.GI1460@garage.freebsd.pl> <CAJ-FndCnfqG4b_StS26WcPT-RhAhvJOOVryJ7rhi__y8Xkr92g@mail.gmail.com> <20121125131252.GJ1460@garage.freebsd.pl> <CAJ-FndAfCYmV7UawgxeKUMRaWaj%2B4XzVEUrxXnCC73sstJUqqg@mail.gmail.com> <20121125134743.GK1460@garage.freebsd.pl>

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On Sun, Nov 25, 2012 at 1:47 PM, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
> On Sun, Nov 25, 2012 at 01:37:19PM +0000, Attilio Rao wrote:
>> On Sun, Nov 25, 2012 at 1:12 PM, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
>> > On Sun, Nov 25, 2012 at 12:42:16PM +0000, Attilio Rao wrote:
>> >> On Sun, Nov 25, 2012 at 12:39 PM, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
>> >> > WITNESS is a development tool. We don't ship production kernels with
>> >> > WITNESS even compiled in. What is more efficient use of developer time:
>> >> > going through full reboot cycle every time or reading the warning from
>> >> > console, unloading a module, fixing the bug and loading it again?
>> >> >
>> >> > And if this option is turned off by default what is the problem?
>> >>
>> >> Yes, so, why do you write here?
>> >
>> > I'm trying to understand why do you object. Until now the only concern
>> > you have that I found is that you are afraid of it being abused. I don't
>> > see how this can be abused if it is turned off by default. If someone
>> > will commit a change that will turn it on by default, believe me, I'll
>> > unleash hell personally.
>>
>> So I don't understand what are you proposing.
>> You are not proposing to switch BLESSING on and you are not proposing
>> to import Adrian's patches in, if I get it correctly. I don't
>> understand then.
>
> I propose to get Adrian's patches in, just leave current behaviour as
> the default.

So if I tell that I'm afraid this mechanism will be abused (and
believe me, I really wanted to trimm out BLESSING stuff also for the
same reason) and you say "you can't see how" there is not much we can
discuss.

You know how I think, there is no need to wait for me to reconsider,
because I don't believe this will happen with arguments like "I don't
think", "I don't agree", etc.

Attilio


-- 
Peace can only be achieved by understanding - A. Einstein



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