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Re: kern/37915: vt100 + wscons + tty vmlocking changes = panic
The following reply was made to PR kern/37915; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
Subject: Re: kern/37915: vt100 + wscons + tty vmlocking changes = panic
Date: Mon, 8 Dec 2008 17:36:47 +0000
On Wed, Jan 30, 2008 at 01:30:00AM +0000, dholland%eecs.harvard.edu@localhost
> >Synopsis: vt100 + wscons + tty vmlocking changes = panic
> Sending some VT100 control sequences to wscons will panic the kernel.
> The problem is that ttwrite() holds tty_lock while calling ttstart();
> this makes its way down to wsemul_vt100_handle_csi(), which for
> several sequences that report stuff back calls wsdisplay_emulinput(),
> which calls ttyinput(), which tries to get tty_lock again.
This still happens with up-to-the-minute current.
David A. Holland
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