[lug] KGDB and 2.6 {no filter}

[Rodger.Wilson at Emulex.Com]

I have used KGDB on 2.4 kernels a lot however I have failed to ever get it working with 2.6.  Once I was really close but failed to get the symbol table from my driver, then this week I couldn't even break into the kernel.

If you have a working 2.6 KGDB kernel I would love to get a tar file from you and maybe a 5 min tutorial on how to get the symbol table across to GDB.

Rodger Wilson 
Senior engineer - Emulex
720-394-7275 (cell)
720-494-2488 (work)

 -----Original Message-----
From: 	lug-bounces at lug.boulder.co.us [mailto:lug-bounces at lug.boulder.co.us]  On Behalf Of Ian S. Nelson
Sent:	Wednesday, August 04, 2004 6:53 PM
To:	Boulder (Colorado) Linux Users Group -- General Mailing List
Subject:	Re: [lug] KGDB and 2.6     {no filter}

 << File: OpenPGP digital signature >> << File: ATT20716.txt >> I use it from time to time.

What's not working?

Ian


Rodger.Wilson at Emulex.Com wrote:

 >Does anyone else here use KGDB?  I have been struggling to get it to 
working with 2.6 off and on for the last month.
 >
 >Rodger Wilson
 >Senior engineer - Emulex
 >720-394-7275 (cell)
 >720-494-2488 (work)
 >
 > -----Original Message-----
 >From:     lug-bounces at lug.boulder.co.us 
[mailto:lug-bounces at lug.boulder.co.us]  On Behalf Of Wilson, Rodger
 >Sent:    Tuesday, August 03, 2004 3:37 PM
 >To:    lug at lug.boulder.co.us
 >Subject:    RE: [lug] Unable to mount root fs on 
unknown-block(22,5)     {no filter}
 >
 >Ok today seems to be my day of issues.
 >
 >Now I am getting the following error:
 >
 >Kernel panic: No init found.  Try passing init= option to kernel.
 >
 >Should I add an init option to LILO?  If so what init=/dev/hdc5?
 >
 >Rodger Wilson
 >Senior engineer - Emulex
 >720-394-7275 (cell)
 >720-494-2488 (work)
 >
 > -----Original Message-----
 >From:     lug-bounces at lug.boulder.co.us 
[mailto:lug-bounces at lug.boulder.co.us]  On Behalf Of Wilson, Rodger
 >Sent:    Tuesday, August 03, 2004 9:48 AM
 >To:    lug at lug.boulder.co.us
 >Subject:    RE: [lug] Unable to mount root fs on 
unknown-block(22,5)     {no filter}
 >
 >You were right!  I guess I just assumed that IDE support was built 
into the system.... Silly me.
 >
 >Rodger Wilson
 >Senior engineer - Emulex
 >720-394-7275 (cell)
 >720-494-2488 (work)
 >
 > -----Original Message-----
 >From:     lug-bounces at lug.boulder.co.us 
[mailto:lug-bounces at lug.boulder.co.us]  On Behalf Of Kevin Fenzi
 >Sent:    Tuesday, August 03, 2004 9:46 AM
 >To:    lug at lug.co.boulder.us
 >Subject:    Re: [lug] Unable to mount root fs on 
unknown-block(22,5)     {no filter}
 >

> >>>>>"Rodger" == Rodger Wilson <Rodger.Wilson at Emulex.Com> writes:
>
>
> Rodger> I am in the process of installing a new 2.6.5kgdb kernel.  It
> Rodger> has successfully created an initrd image. Which I presume is
> Rodger> at block 22, considering my error message.  Lilo load the
> Rodger> kernel, then loads block 22, and then cant mount the image.
> Rodger> ...........................  serio: i8042 AUX port at
> Rodger> 0x60,0x64 irq 12 input: ImPS/2 Generic Wheel Mouse on
> Rodger> isa0060/serio1 serio: i8042 KBD port at 0x60,0x64 irq 1 input:
> Rodger> AT Translated Set 2 keyboard on isa0060/serio0 Kernel panic:
> Rodger> VFS: Unable to mount root fs on unknown-block(22,5)
> Rodger> ...........................
>
> Rodger> Could the kernel be expecting an uncompressed ram disk?
> Rodger> Do all ram disks have the same filesystem?
> Rodger> Can I verify that my ram disk is truly at block 22?
>
> The problem probibly isn't the ramdisk...
>
> when it says 'unknown-block(22,5)' it likely means block device 22,5,
> which is hdc5. Ie, the master ide drive on the second ide channel,
> partition number 5.
>
> Usually this sort of message results from not having the IDE driver
> support built into your kernel.
>
> Did you enable ide support when you configured the kernel?
> Is hdc5 your / partition?
>
> Under RedHat/Fedora based setups, you will want to use 'mkinitrd' to
> make your inital ram disk. If thats having issues you can use that
> command to make a new one.
>
> Rodger> Rodger Wilson Senior engineer - Emulex 720-394-7275 (cell)
> Rodger> 720-494-2488 (work)
>
> kevin




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*Ian S. Nelson
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