kdb with RHEL 6.2

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How do I configure Red Hat Enterprise Linux 6.2 to use the kdb kernel debugger?

im
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Jamie Bainbridge's picture Red Hat Guru 7257 points
14 November 2013 4:57 AM

We don't seem to ship KDB. The tool most commonly used for debugging a live kernel or vmcore is crash.

im Newbie 15 points
14 November 2013 10:45 AM

Thanks, but crash does not allow me to set breakpoints - is kgdb the only supported method of doing this?

Jamie Bainbridge's picture Red Hat Guru 7257 points
15 November 2013 5:14 AM

There's a method to setup GDB+KGDB documented over at Bug 710668, Comment 15. This uses plain old GDB, which is a supported component. As you'll see from the errata, this only works in RHEL 6.2 (kernel-2.6.32-220) and later.

For specific instrumentation not exposed in existing debugging, we (in support) usually use SystemTap. The syntax is well documented and there are many example tapsets.

rohan.ferris@justice.qld.gov.au's picture Newbie 10 points
10 December 2013 4:21 AM

Thanks for your help Bainbridge.

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