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Subject: Re: 2.6.16.18 kernel freezes while pppd is exiting
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Paul Fulghum <paulkf@microgate.com>
Cc: Chuck Ebbert <76306.1226@compuserve.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
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Date: Mon, 12 Jun 2006 17:36:45 +0100
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Ar Llu, 2006-06-12 am 11:11 -0500, ysgrifennodd Paul Fulghum:
> If a driver has low_latency set, flush_to_ldisc
> can be called from both scheduled work (due to
> hitting TTY_DONT_FLIP) and directly from an ISR.
> On an SMP system, they can run in parallel.

Ok, so yet another reason that the ugly TTY_DONT_FLIP hack should die
forever.

Alan