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Subject: Re: [patch] O(1) scheduler, -H4 - 2.4.17 problems
From: Robert Love <rml@tech9.net>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Dieter =?ISO-8859-1?Q?N=FCtzel?= <Dieter.Nuetzel@hamburg.de>,
        Ed Tomlinson <tomlins@cam.org>, Ingo Molnar <mingo@elte.hu>,
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Date: 10 Jan 2002 22:41:36 -0500
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On Thu, 2002-01-10 at 22:11, Davide Libenzi wrote:

> Move init_idle() before the first call to kernel_thread().
> This should fix it.

On 2.4.17-pre3, UP, with -H5, the following patch failed to fix the
problem -- still hardlock on "Starting kswapd".  I still suspect the
problem is with the init_idle changes, though ...

--- linux-2.4.18-pre3-ingo/init/main.c	Thu Jan 10 21:13:12 2002
+++ linux/init/main.c	Thu Jan 10 22:33:46 2002
@@ -590,14 +590,14 @@
 	check_bugs();
 	printk("POSIX conformance testing by UNIFIX\n");
 
+	smp_init();
+	init_idle();
 	kernel_thread(init, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);
 	/* 
 	 *	We count on the initial thread going ok 
 	 *	Like idlers init is an unlocked kernel thread, which will
 	 *	make syscalls (and thus be locked).
 	 */
-	smp_init();
-	init_idle();
 	unlock_kernel();
 	printk("All processors have done init_idle\n");

	Robert Love

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