On Tue, 2013-02-26 at 00:51 -0800, John Wright wrote: > On Thu, Feb 21, 2013 at 09:27:38AM -0500, David Magda wrote: > > On 2013-02-12 09:07, David Magda wrote: > > > > >In /usr/share/doc/kdump-tools/README.Debian the following text appears: > > > > > >4. Debug Kernel > > > You *should* have a debug kernel in order for makedumpfile to process > > > the vmcore file. Without a debug kernel, the transfer process is > > > reduced to using "makedumpfile -d 1". Options: > > > A) If /usr/lib/debug/vmlinux-$(uname -r) exists, kdump-tools will > > > use that kernel. > > > B) Explicitly set DEBUG_KERNEL in /etc/default/kdump-tools to > > > point to your debug kernel. > > > C) None of the above. makedumpfile will still work, but your > > > dumpfile will be larger and take longer to save to disk. > > > > > >However all (?) the default -dbg Debian kernel packages put the kernels > > >in /usr/lib/debug/boot/: > > [...] > > >IMHO it would make sense to change (A) so that things worked automagically. > > > > > >If someone had a truly custom kernel, then tweaking DEBUG_KERNEL per (B) > > >would make sense, but the 'standard' Debian tools should work with the > > >standard Debian kernels. > > > > > >The other options would be to remove the boot/ from the debug kernel path. > > > > Has anyone had a chance to take a look at this and evaluate if it's > > a valid concern, or am I just talking crazy? > > Sorry, I agree the defaults should match the Debian defaults. When > kdump-tools was written there was no such Debian default, so we made one > up for the custom distro kdump-tools was originally included in. > > That said...it looks like version 3.2.39-1 of the linux package added > some symlinks to /usr/lib/debug. > > I'm on the fence about changing kdump-tools - in principle it would be > nice if the defaults didn't have to refer to symlinks, but I haven't > been able to find much time to work on this stuff recently. I welcome a > patch. :)
It might still be worth changing the packaged kdump-tools so that it works with older kernel debug packages. But adding the symlinks means that our debug packages should also work with non-packaged tools (e.g. if someone builds a newer upstream version of kdump-tools or systemtap). Ben. -- Ben Hutchings Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
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