[lttng-dev] lttng-tools and userspace-rcu

[David Goulet]

Yes it is. URCU is used extensively in lttng-tools regardless of UST
tracing or not.

David

Thibault, Daniel:
>    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
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