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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-03-08 18:04:14 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-03-14 19:17:40 +0100 |
| commit | c1ac094d5061e757624a47217d2195ba24a75450 (patch) | |
| tree | b086f38632adec636b977734f22431432ece268b /Documentation/trace | |
| parent | perf powerpc: Choose local entry point with kretprobes (diff) | |
| download | linux-c1ac094d5061e757624a47217d2195ba24a75450.tar.xz linux-c1ac094d5061e757624a47217d2195ba24a75450.zip | |
doc: trace/kprobes: add information about NOKPROBE_SYMBOL
Update kprobe tracer documentation to also mention that
NOKPROBE_SYMBOL() and nokprobe_inline add symbols to the kprobes
blacklist.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/d924e20de099579ace4286e610304f054cd798db.1488991670.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/kprobetrace.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt index 41ef9d8efe95..5ea85059db3b 100644 --- a/Documentation/trace/kprobetrace.txt +++ b/Documentation/trace/kprobetrace.txt @@ -8,8 +8,9 @@ Overview -------- These events are similar to tracepoint based events. Instead of Tracepoint, this is based on kprobes (kprobe and kretprobe). So it can probe wherever -kprobes can probe (this means, all functions body except for __kprobes -functions). Unlike the Tracepoint based event, this can be added and removed +kprobes can probe (this means, all functions except those with +__kprobes/nokprobe_inline annotation and those marked NOKPROBE_SYMBOL). +Unlike the Tracepoint based event, this can be added and removed dynamically, on the fly. To enable this feature, build your kernel with CONFIG_KPROBE_EVENTS=y. |