On Tue, 2007-01-02 at 18:38 +0000, Alan wrote: > > with tty->low_latency set, but it doesn't AFAICS. One possibility > for > > deadlock is if the tty->buf.lock spinlock is taken on behalf of a > user > > process... > > The case to watch out for is > > flip_buffer_push -> ldisc -> driver write of echo/^S/^Q > > if you call flip_buffer_push while holding your own lock you may get > in a mess on the echo path.
Agreed. However, that's not what the comment says: * tty_flip_buffer_push - terminal * @tty: tty to push * * Queue a push of the terminal flip buffers to the line discipline. This * function must not be called from IRQ context if tty->low_latency is set. -- Hollis Blanchard IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
