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Date:      Wed, 8 Jan 2003 23:45:32 +0100
From:      Vincent Jardin <vjardin@wanadoo.fr>
To:        Garrett Wollman <wollman@lcs.mit.edu>
Cc:        net@FreeBSD.ORG
Subject:   Re: rt_refcnt and rtentry protection ??
Message-ID:  <3E075B32006E7C25@mel-rta8.wanadoo.fr> (added by postmaster@wanadoo.fr)
In-Reply-To: <200301082206.h08M6eHm008984@khavrinen.lcs.mit.edu>
References:  <0H8E00ASUXB1HW@mta5.snfc21.pbi.net> <3E075B1B006D4334@mel-rta7.wanadoo.fr> <200301082206.h08M6eHm008984@khavrinen.lcs.mit.edu>

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>
> So long as the route is marked RTF_UP, it cannot be deleted.  In a
> single-threaded kernel, it is not possible for this code to be
> preempted, so there is no means by which the route flags could be
> changed.  (RTF_UP is unset when and only when the route is deleted
> from the radix tree.)

I agree. However, how would it work on a multi-threaded FreeBSD 5 kernel ?

Regards,
  Vincent

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