Re: [patch] Re: [perf] Finding uninstalled modules Was Re: mailinglist for trace users

From: Mike Galbraith
Date: Wed Sep 23 2009 - 10:52:37 EST


On Wed, 2009-09-23 at 17:39 +0300, Avi Kivity wrote:
> On 09/23/2009 05:09 PM, Mike Galbraith wrote:
> >
> >> Mine says:
> >>
> >> kernel/arch/x86/kvm/kvm.ko:
> >> kernel/arch/x86/kvm/kvm-intel.ko: kernel/arch/x86/kvm/kvm.ko
> >>
> >> Which is reasonable for /lib/modules/2.6.31, not for a source directory.
> >>
> > Yup, there's the problem. The code assumes that the path to modules.dep
> > and the path stored in modules.dep will agree.
> >
> > Wants some robustification.
> >
>
> The trace shows modules.dep was picked up from /lib/modules/2.6.31, so
> if it continued that and picked up the modules from the same place,
> everything would work. Why does it try to pick up the modules from cwd?

I don't know where that cwd is coming from off the top of my head.

The symbol loading code reads the path stored in modules.dep, and chops
at ':'.

> >> open("kernel/arch/x86/kvm/kvm-intel.ko", O_RDONLY) = -1 ENOENT (No
...
> Mine says:
>
> kernel/arch/x86/kvm/kvm.ko:
> kernel/arch/x86/kvm/kvm-intel.ko: kernel/arch/x86/kvm/kvm.ko

-Mike

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