Let's assume I want to do a kernel-only LTTng installation.  After putting 
lttng-modules in place, I get lttng-tools and, at its configure step, I do:

./configure --disable-lttng-ust

   However, this fails with:

checking whether cds_list_add is declared... no
configure: error: liburcu >= 0.7.2 or newer is needed

   Is this normal?  If so, why is userspace-rcu (liburcu) needed for a 
kernel-only tracing solution?  (I'm using a fairly recent set of lttng 
2.2.0-rc1 git tarballs)

Daniel U. Thibault
Protection des systèmes et contremesures (PSC) | Systems Protection & 
Countermeasures (SPC)
Cyber sécurité pour les missions essentielles (CME) | Mission Critical Cyber 
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