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docs: add a note about kernel symbols to the ebpf documentation

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Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
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Rolf Neugebauer 2017-01-06 16:52:16 +00:00
parent 8ed1408b19
commit fe533386f0
1 changed files with 5 additions and 0 deletions
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@ -15,3 +15,8 @@ You probably want to run with
interactive use as some things use debugfs. You need at least `CAP_SYS_ADMIN` to do anything.
There are examples in `bcc/examples` that should generally just work, I have tried several of
the Lua ones.
Some of the `iovisor/bcc` samples try to access the kernel symbols. For them to work correctly you should also execute:
```sh
echo 0 > /proc/sys/kernel/kptr_restrict
```