Re: 2.6.25-mm1: not looking good

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To: Ingo Molnar <mingo@...>
Cc: Jason Wessel <jason.wessel@...>, Andrew Morton <akpm@...>, <tglx@...>, <penberg@...>, <linux-usb@...>, <linux-kernel@...>, <linux-mm@...>, <jmorris@...>, <sds@...>
Date: Friday, April 18, 2008 - 7:46 am

On Fri, Apr 18, 2008 at 9:37 AM, Ingo Molnar <mingo@elte.hu> wrote:

With the patch below, it seems 100% reproducible to me (7 out of 7
bootups hung).

The number of loops it could do before hanging were, in order: 697,
898, 237, 55, 45, 92, 59

It seems timing-related, so I'm guessing it could be some interaction
with interrupts?


Vegard


diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index 6d6286c..ee87820 100644
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -895,7 +895,13 @@ static void kgdbts_run_tests(void)
        v1printk("kgdbts:RUN bad memory access test\n");
        run_bad_read_test();
        v1printk("kgdbts:RUN singlestep breakpoint test\n");
-       run_singlestep_break_test();
+
+       while(1) {
+               static int i = 0;
+
+               run_singlestep_break_test();
+               printk(KERN_EMERG "test #%d successfull\n", i++);
+       }

        /* ===Optional tests=== */
--
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Messages in current thread:
2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 7:03 pm)
2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Mon Apr 28, 12:42 pm)
Re: 2.6.25-mm1: Failing to probe IDE interface, Bartlomiej Zolnierkiewicz..., (Mon Apr 28, 2:44 pm)
Re: 2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Tue Apr 29, 5:43 am)
Re: 2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Tue Apr 29, 11:49 am)
Re: 2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Tue Apr 29, 12:58 pm)
Re: 2.6.25-mm1: Failing to probe IDE interface, Bartlomiej Zolnierkiewicz..., (Tue Apr 29, 5:37 pm)
Re: 2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Wed Apr 30, 7:16 am)
Re: 2.6.25-mm1: Failing to probe IDE interface, Andrew Morton, (Mon Apr 28, 12:59 pm)
Re: 2.6.25-mm1: Failing to probe IDE interface, Mel Gorman, (Tue Apr 29, 5:39 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 3:50 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 3:53 am)
Re: 2.6.25-mm1: not looking good, Pavel Machek, (Fri Apr 18, 7:07 am)
Re: 2.6.25-mm1: not looking good, Pavel Machek, (Fri Apr 18, 5:42 am)
Re: 2.6.25-mm1: not looking good, Alan Stern, (Fri Apr 18, 11:22 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 3:57 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 5:22 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 8:18 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 3:09 am)
Re: 2.6.25-mm1: not looking good, Pekka Enberg, (Fri Apr 18, 2:40 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 3:24 am)
Re: 2.6.25-mm1: not looking good, James Morris, (Fri Apr 18, 6:32 am)
Re: 2.6.25-mm1: not looking good, Pekka Enberg, (Fri Apr 18, 3:25 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 2:56 am)
Re: 2.6.25-mm1: not looking good, Arjan van de Ven, (Fri Apr 18, 1:49 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 2:10 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 3:19 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 3:28 am)
Re: Stack protector build failure (was Re: 2.6.25-mm1: not l..., Arjan van de Ven, (Fri Apr 18, 12:57 pm)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 5:28 am)
Re: 2.6.25-mm1: not looking good, Paul Moore, (Thu Apr 17, 7:55 pm)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 9:35 pm)
Re: 2.6.25-mm1: not looking good, Paul Moore, (Fri Apr 18, 10:57 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 8:04 pm)
Re: 2.6.25-mm1: not looking good, Paul Moore, (Fri Apr 18, 10:55 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 7:40 pm)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 8:14 pm)
Re: 2.6.25-mm1: not looking good, Jason Wessel, (Thu Apr 17, 11:05 pm)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 3:37 am)
Re: 2.6.25-mm1: not looking good, Jason Wessel, (Fri Apr 18, 5:54 pm)
Re: 2.6.25-mm1: not looking good, Vegard Nossum, (Fri Apr 18, 7:46 am)
Re: 2.6.25-mm1: not looking good, Ingo Molnar, (Fri Apr 18, 8:34 am)
Re: 2.6.25-mm1: not looking good, Vegard Nossum, (Fri Apr 18, 8:41 am)
Re: 2.6.25-mm1: not looking good, Jason Wessel, (Fri Apr 18, 9:02 am)
Re: 2.6.25-mm1: not looking good, Vegard Nossum, (Fri Apr 18, 9:22 am)
Re: 2.6.25-mm1: not looking good, Jason Wessel, (Fri Apr 18, 9:27 am)
Re: 2.6.25-mm1: not looking good, Vegard Nossum, (Fri Apr 18, 10:47 am)
Re: 2.6.25-mm1: not looking good, Vegard Nossum, (Fri Apr 18, 12:02 pm)
Re: 2.6.25-mm1: not looking good, Greg KH, (Thu Apr 17, 7:24 pm)
Re: 2.6.25-mm1: not looking good, Kay Sievers, (Thu Apr 17, 8:48 pm)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Fri Apr 18, 12:07 am)
Re: 2.6.25-mm1: not looking good, Andrew Morton, (Thu Apr 17, 9:12 pm)
Re: 2.6.25-mm1: not looking good, Dan Williams, (Thu Apr 17, 7:24 pm)