Hi, I want to use systemtap and installed rpm's systemtap-0.9.7-5.el5 systemtap-runtime-0.9.7-5.el5 kernel-debuginfo-common-2.6.18-164.el5.x86_64.rpm kernel-debuginfo-2.6.18-164.el5.x86_64.rpm I cannot find the correct kernel-devel rpm. uname -a gives as kernel 2.6.18-164.0.0.0.1 I have the following questions: 1.Did I install the correct rpm's? 2.Where can I find the correct kernel-devel? 3.Can it be omitted? 4. When running script probe kernel.function("*") {} I get the errors below: Pass 1: parsed user script and 52 library script(s) in 250usr/0sys/265real ms. semantic error: libdwfl failure (missing x86_64 kernel/module debuginfo under '/lib/modules/2.6.18-164.0.0.0.1.el5xen/build'): No such file or directory while resolving probe point kernel.function("*") semantic error: no probes found Pass 2: analyzed script: 0 probe(s), 0 function(s), 0 embed(s), 0 global(s) in 0usr/0sys/6real ms. Pass 2: analysis failed. Try again with another '--vp 01' option. Is that due to the missing kernel-devel package or is something else wrong? Regards Hans