From: Andi Kleen <ak@muc.de>
To: torvalds@transmeta.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] Fix console initialization deadlock for x86-64
Date: Sat, 20 Apr 2002 18:31:59 +0200 [thread overview]
Message-ID: <20020420183159.A22349@averell> (raw)
When vt_init happens to run before the keyboard is initialized (the order is random
because they're both different initcalls) then set_leds raises an not yet enabled
tasklet. This causes an endless loop on the first schedule() call because the tasklet
handling cannot handle raised but disabled tasklets.
This patch just does not do set_leds in virtual terminal initialization to avoid that.
It is done later anyways.
Patch for 2.5.8
-Andi
diff -X ../../KDIFX -x *-o -x *-RESERVE -burpN ../../v2.5/linux/drivers/char/console.c linux/drivers/char/console.c
--- ../../v2.5/linux/drivers/char/console.c Wed Jan 30 22:38:01 2002
+++ linux/drivers/char/console.c Thu Apr 18 17:32:23 2002
@@ -1420,7 +1420,8 @@ static void reset_terminal(int currcons,
kbd_table[currcons].slockstate = 0;
kbd_table[currcons].ledmode = LED_SHOW_FLAGS;
kbd_table[currcons].ledflagstate = kbd_table[currcons].default_ledflagstate;
- set_leds();
+ /* do not do set_leds here because this causes an endless tasklet loop
+ when the keyboard hasn't been initialized yet */
cursor_type = CUR_DEFAULT;
complement_mask = s_complement_mask;
reply other threads:[~2002-04-20 16:37 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20020420183159.A22349@averell \
--to=ak@muc.de \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@transmeta.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).