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Date:      Mon, 17 Feb 2003 11:19:39 +0900
From:      JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
To:        Brooks Davis <brooks@one-eyed-alien.net>
Cc:        Abdul Basit <basit@basit.cc>, net@FreeBSD.ORG, 6bone@mailman.isi.edu
Subject:   Re: pim6sd crash
Message-ID:  <y7vadgvzm10.wl@ocean.jinmei.org>
In-Reply-To: <20030216145145.A30301@Odin.AC.HMC.Edu>
References:  <Pine.BSF.4.53.0302141741490.18936@wireless.cs.twsu.edu> <y7vlm0gy9ug.wl@ocean.jinmei.org> <20030216145145.A30301@Odin.AC.HMC.Edu>

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>>>>> On Sun, 16 Feb 2003 14:51:45 -0800, 
>>>>> Brooks Davis <brooks@one-eyed-alien.net> said:

>> >  on freebsd 5.0-Release, pim6sd crashes if i execute
>> > ifconfig gifX destroy if it is running in background,
>> > i need to restart it manually.
>> 
>> >  pim6sd display 'check_vif_state' Device not configured
>> > and exits. any workaround ?
>> 
>> A workaround is not to destroy an interface when pim6sd is running on
>> the interface.
>> 
>> Note that this kind of trouble is not specific to pim6sd.  Dynamic
>> interface creation/deletion is a big architectural change to the
>> traditional BSD kernel, and I bet there are many other applications
>> affected by such an operation.

> The user of the destroy command of ifconfig is expected to be paying
> attention.  This is the functionaly equivalent of yanking a NIC out
> of its slot.  It is the case that applications that can't handle this
> are broken and need to be fixed becase you shouldn't count on any
> interfaces staying around.

(Just in case) I didn't intend to say create/destroy is the wrong
approach and pim6sd doesn't need a fix.  My point is that
create/destroy is a big change that can affect many applications
(including pim6sd) and that a "workaround" is not to use the operation
for now.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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