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Hey,<br>
See comments below.<br>
<br>
<div class="moz-cite-prefix">On 2015-03-20 09:34 AM, Rui Han wrote:<br>
</div>
<blockquote
cite="mid:CABy43G9szQBY9eObtid3D0nDTBxm-50dSbT73MT-v_ac+4n9Tw@mail.gmail.com"
type="cite">
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<p style="margin:1.2em 0px!important">Hi,</p>
<p style="margin:1.2em 0px!important">I have encountered
following output when I try to run make from the
lttng-modules source cloned from git repo. I have tried in a
clean install of both 12.04 and 14.04.</p>
<pre style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;font-size:1em;line-height:1.2em;margin:1.2em 0px"><code style="font-size:0.85em;font-family:Consolas,Inconsolata,Courier,monospace;margin:0px 0.15em;padding:0px 0.3em;white-space:pre-wrap;border:1px solid rgb(234,234,234);border-radius:3px;display:inline;background-color:rgb(248,248,248);white-space:pre;overflow:auto;border-radius:3px;border:1px solid rgb(204,204,204);padding:0.5em 0.7em;display:block!important">make -C /lib/modules/3.13.0-45-generic/build M=/home/troguard32/lttng/lttng-modules modules
make[1]: Entering directory `/usr/src/linux-headers-3.13.0-45-generic'
/home/troguard32/lttng/lttng-modules/probes/Makefile:30: File /usr/src/linux-headers-3.13.0-45-generic/virt/kvm/iodev.h not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.
/home/troguard32/lttng/lttng-modules/probes/Makefile:142: Files /usr/src/linux-headers-3.13.0-45-generic/fs/btrfs/*.h not found. Probe "btrfs" is disabled. Use full kernel source tree to enable it.
/home/troguard32/lttng/lttng-modules/probes/Makefile:158: Files /usr/src/linux-headers-3.13.0-45-generic/fs/ext4/*.h not found. Probe "ext4" is disabled. Use full kernel source tree to enable it.
Building modules, stage 2.
MODPOST 43 modules
make[1]: Leaving directory `/usr/src/linux-headers-3.13.0-45-generic'
</code></pre>
<p style="margin:1.2em 0px!important">when run make
modules_install, it seem the installation is successful, but
the output is abnormal, giving repeated “Can’t read private
key” messages.</p>
<p style="margin:1.2em 0px!important">If I ignore this message
and install all other lttng components, it seems lttng
kernel tracer is working fine. </p>
<p style="margin:1.2em 0px!important">My question is,</p>
<ol style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">How to completely remove this
abnormal message? where to specify the full kernel source
path in make file? (I am a makefile beginner)</li>
</ol>
</div>
</div>
</blockquote>
Abnormal message being the key related one? We are looking into but
this does not in any way change behavior.<br>
<br>
As for the warning for kvm/btrfs/ext4. Nothing to worry about you
simply don't have these components installed on your system.<br>
<blockquote
cite="mid:CABy43G9szQBY9eObtid3D0nDTBxm-50dSbT73MT-v_ac+4n9Tw@mail.gmail.com"
type="cite">
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<ol style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">How to check whether the
lttng-modules installed is fully functional or not?</li>
</ol>
</div>
</div>
</blockquote>
A quick check is the one you probably did: lttng list -k. You can
also run the root_regression tests from lttng-tools. Under ./tests
you can run ./run.sh root_regression while being root.<br>
<blockquote
cite="mid:CABy43G9szQBY9eObtid3D0nDTBxm-50dSbT73MT-v_ac+4n9Tw@mail.gmail.com"
type="cite">
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<div class="markdown-here-wrapper" style="">
<ol style="margin:1.2em 0px;padding-left:2em">
<li style="margin:0.5em 0px">Does the above message is just
telling me that I will be able to use the full function of
lttng-modules except those file system probe mentioned in
the make output? </li>
</ol>
</div>
</div>
</blockquote>
Exactly. <br>
<blockquote
cite="mid:CABy43G9szQBY9eObtid3D0nDTBxm-50dSbT73MT-v_ac+4n9Tw@mail.gmail.com"
type="cite">
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<div class="markdown-here-wrapper" style="">
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<p style="margin:1.2em 0px!important">Thank you very much.</p>
<p style="margin:1.2em 0px!important">Best regards,<br>
Rui</p>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Jonathan R. Julien
Efficios</pre>
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