On 3/18/15 1:43 PM, David Miller wrote:
From: David Ahern <david.ahern@xxxxxxxxxx>
Date: Wed, 18 Mar 2015 10:56:22 -0600
I am trying to understand why the perf tool on sparc fails to convert
kernel symbols when /proc/kcore is used. I have instrumented perf to
the point I can see that it drops symbols from kallsyms because it
cannot find a corresponding map when the kernel maps are created based
on parsing /proc/kcore.
I'm looking into this, I think we need to set ARCH_PROC_KCORE_TEXT in
arch/sparc/Kconfig
Missed that config in my fumbling through the kcore code. Adding it to
sparc/Kconfig and it works. map is added:
kcore_mapfn: dso [kernel.kallsyms]: new map from 404000 to e33d79
and kernel symbols are not dropped. One mystery solved.
Thanks,
David
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