HEADS UP: Standalone kernel debug files moving out of /boot/kernel/

John-Mark Gurney jmg at funkthat.com
Thu Oct 30 06:20:28 UTC 2014

Steven Hartland wrote this message on Wed, Oct 29, 2014 at 16:49 +0000:
> Hmm not sure I like this idea as it would make it more difficult to make 
> a copy / backup a kernel.
> ATM when I want to copy a kernel for debugging its a one liner, 
> splitting debug symbols off to /usr/lib would prevent this.
> Is there not a way to allow separate install of the debug files but to 
> the same location maintaining compartmentalization for the needed kernel 
> files?

Oh, make sure that make install (or installkernel) properly handles
moving the debug data too... i.e. kernel to kernel.old...

> On 29/10/2014 00:20, Ed Maste wrote:
> >I am preparing to move the standalone kernel debug data out of
> >/boot/kernel/ into /usr/lib/debug/boot/kernel/, mirroring the approach
> >used for userland debug data. This significantly reduces the boot
> >partition size requirement, and is a step towards supporting the
> >installation of kernel debug data ony when required. LLDB and GDB
> >automatically search for debug data under /usr/lib/debug/ so this
> >change should be transparent from an end-user perspective.
> >
> >The change can be reviewed in Phabricator at
> >https://reviews.freebsd.org/D1006 and can be fetched as a unified diff
> >from https://people.freebsd.org/~emaste/patches/D1006.diff
> >
> >This does not change any defaults or knobs: kernel debug files are
> >still built by default, and may be disabled by setting
> >WITHOUT_KERNEL_SYMBOLS=YES in /etc/src.conf. I hope to rationalize
> >this with userland debug in a later step.
> >
> >Note that the change renames the intermediate and debug data files to
> >be consistent with userland debug data: in the build directory the
> >kernel with debug data included is now named kernel.full, and and
> >kernel.debug is the standalone debug data file.
> >
> >I plan to merge this in a few days if there are no issues reported in
> >further review or testing.

  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."

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