ftrace: Have cached module filters be an active filter

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When a module filter is added to set_ftrace_filter, if the module is not
loaded, it is cached. This should be considered an active filter, and
function tracing should be filtered by this. That is, if a cached module
filter is the only filter set, then no function tracing should be happening,
as all the functions available will be filtered out.

This makes sense, as the reason to add a cached module filter, is to trace
the module when you load it. There shouldn't be any other tracing happening
until then.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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This commit is contained in:

Steven Rostedt (VMware) 2017-06-26 11:47:31 -04:00

parent d7fbf8df7c

commit 8c08f0d5c6

3 changed files with 23 additions and 6 deletions

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2

include/linux/ftrace.h

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20

kernel/trace/ftrace.c

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7

kernel/trace/trace.h

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