Added by Daniel U. Thibault over 10 years ago. Updated over 10 years ago.
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Description
The lttng 2.3 man pages still claim that "Filter only allowed when enabling events within a session before tracing is started."
That is not true, you can enable new events with filters while the trace is running.
Fixed with commit: 7b4572b71d29a35d7408d0a25913990573fd80c0
That commit did not resolve this bug. According to http://git.lttng.org/?p=lttng-tools.git;a=blobdiff;f=doc/man/lttng.1;h=0f9cd9c516b3a3fbc4955643ab1e6e4885babc61;hp=659a27c66eb8d0fb09cb0f6f5f34daf209c06038;hb=7b4572b71d29a35d7408d0a25913990573fd80c0;hpb=5a5b4330b2bc140e22d9971a0697236e1cecf330 it changed the man page to read:
.BR "\-\-filter 'expression'" Set a filter on a newly enabled event. Filter expression on event fields and context. The event will be recorded if the filter's expression evaluates to TRUE. Only specify on first activation of a given event within a session. Specifying a filter is only allowed when enabling events within a session before tracing is started. If the filter fails to link with the event within the traced domain, the event will be discarded. Filtering is currently only implemented for the user-space tracer.
The sentence "Specifying a filter is only allowed when enabling events within a session before tracing is started." should be deleted.