Am 10.02.2014 11:56, schrieb Steven Noonan: > I maintain the Arch Linux EC2 kernel, and I'm doing adventurous things > with the packaging to make debugging a bit easier. I am looking at > enabling CONFIG_DEBUG_INFO and adding -debug packages. That will > indeed require removing the compression stage for the modules. In my > experience this has had no negative impact. In fact, tools like 'perf' > look for separate debug symbols.
I was unaware that there is a way to debug kernel modules. And I am sceptical. So you can debug modules, but not built-in stuff? This all sounds very weird. > As for module builds, you're correct: > > MODPOST 1 modules > FATAL: vmlinux has no symtab? > /usr/src/linux-3.13.2-1-ec2/scripts/Makefile.modpost:90: recipe for > target '__modpost' failed > make[1]: *** [__modpost] Error 1 vmlinux is not even needed to build modules. The only reason we install vmlinux is 1) we used to need it for our Xen machines (this is obsolete now) and 2) it is needed for oprofile iirc. I do not think it is in any way related to building modules, or needed for that matter.
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