I have one question in this context. Should we disable optimization when building the kernel when we wish to enable kgdb or should we leave it intact. <br><br>Thanks,<br>Prabhunath<br><br><div class="gmail_quote">On Fri, Jun 24, 2011 at 5:28 PM, Shaji Yusuf <span dir="ltr"><<a href="mailto:shajiyusuf@yahoo.com">shajiyusuf@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Sprio, thanks for the reply!<br>
I root caused the issue by undoing my modifications and debugging again. The<br>
reason why kgdbwait did not kick in was that my point of debug was much before<br>
kgdb module loading. I think kgdb cannot be used for debugging my issue as i<br>
need to debug an issue much close to console init. Is there any way I can make<br>
kgdb load a little early?<br>
<br>
As you said the space between kgdboc=ttyS0, and 115200 also does matter. :)<br>
<br>
Thanks<br>
<font color="#888888">Shaji<br>
</font><div><div></div><div class="h5"><br>
<br>
<br>
<br>
----- Original Message ----<br>
From: Spiro Trikaliotis <<a href="mailto:ml-kernelnewbies@spiro.trikaliotis.net">ml-kernelnewbies@spiro.trikaliotis.net</a>><br>
To: <a href="mailto:kernelnewbies@kernelnewbies.org">kernelnewbies@kernelnewbies.org</a><br>
Sent: Fri, June 24, 2011 3:21:11 PM<br>
Subject: Re: KGDB command line options not working for kernel 2.6.32<br>
<br>
Hello,<br>
<br>
* On Thu, Jun 23, 2011 at 10:39:44PM -0700 Shaji Yusuf wrote:<br>
<br>
> Im using the following compile options for kernel 2.6.32<br>
> CONFIG_KGDB = y<br>
> CONFIG_KGDB_SERIAL_CONSOLE = y<br>
<br>
Same here. The only difference: It is not a vanilla 2.6.32, but a Debian<br>
based 2.6.32-5-686 with only these things changed.<br>
<br>
> While booting the kernel Im using the following command line options<br>
><br>
> kgdboc=ttyS0, 115200 kgdbwait<br>
<br>
Do you have the space between "," and "115200"? I use:<br>
<br>
kgdboc=ttyS0,115200 kgdbwait<br>
<br>
It works as expected.<br>
<br>
<br>
> I tried reordering the options with kgdbwait first, but both are not working.<br>
<br>
I order for kgdbwait to work, it must be after kgdboc. That's what I<br>
found out the hard way. ;)<br>
<br>
> I<br>
> also tried kgdb8250 but no change.<br>
<br>
This one is wrong for 2.6.32.<br>
<br>
> Any help would be highly appreciated.<br>
<br>
Other than the space above, I do not see a big difference between your<br>
setup and mine. Perhaps, the space is the problem?<br>
<br>
Best regards<br>
Spiro.<br>
<br>
--<br>
Spiro R. Trikaliotis <a href="http://opencbm.sf.net/" target="_blank">http://opencbm.sf.net/</a><br>
<a href="http://www.trikaliotis.net/" target="_blank">http://www.trikaliotis.net/</a> <a href="http://www.viceteam.org/" target="_blank">http://www.viceteam.org/</a><br>
<br>
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