Re: A patch for the file kernel/fork.c

[Alexander Nyberg <alexn@dsv.su.se>]

> Instead of the for(;;) msleep, why not just take it permanently off the
> run queue? With the following:
> 
>    set_current_state(TASK_UNINTERRUPTIBLE);
>    schedule();
> 
> It basically gives the same effect, but is cleaner.

Ah perfect, now it looks ok. Thanks!

Prevent recursive faults in do_exit() by leaving the task alone and wait
for reboot. This may allow a more graceful shutdown and possibly save
the original oops.


Signed-off-by: Alexander Nyberg <alexn@telia.com>

Index: mm/kernel/exit.c
===================================================================
--- mm.orig/kernel/exit.c	2005-05-05 16:44:20.000000000 +0200
+++ mm/kernel/exit.c	2005-05-05 17:29:40.000000000 +0200
@@ -797,6 +797,14 @@
 		ptrace_notify((PTRACE_EVENT_EXIT << 8) | SIGTRAP);
 	}
 
+	/* We're taking recursive faults here in do_exit. Safest 
+	 * is to just leave this task alone and wait for reboot. */
+	if (unlikely(tsk->flags & PF_EXITING)) {
+		printk(KERN_ALERT "\nFixing recursive fault but reboot is needed!\n");
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule();
+	}
+
 	tsk->flags |= PF_EXITING;
 
 	/*


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