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Date: Sat, 17 Mar 2001 22:17:20 +1100
From: Andrew Morton <andrewm@uow.edu.au>
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To: John R Lenton <john@grulic.org.ar>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: oops in 2.4.2-ac20
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John R Lenton wrote:
> 
> What the subject says.
> 
> I copied the oops by hand, but the output of ksymoops doesn't
> seem too totally wrong, so I guess I didn't botch it :)
> 

The trace dosn't look right, but you've probably hit
the con_flush_chars-called-from-interrupt problem.

Please add these two lines, let me know if it recurs.

--- linux-2.4.2-ac20/drivers/char/console.c	Tue Mar 13 20:29:21 2001
+++ ac/drivers/char/console.c	Sat Mar 17 22:16:14 2001
@@ -2304,6 +2335,9 @@
 static void con_flush_chars(struct tty_struct *tty)
 {
 	struct vt_struct *vt = (struct vt_struct *)tty->driver_data;
+
+	if (in_interrupt())	/* from flush_to_ldisc */
+		return;
 
 	pm_access(pm_con);
 	acquire_console_sem();
-
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