On Fri, 13 Dec 2019 13:34:46 +0200
Pekka Paalanen <[email protected]> wrote:

> Is there a way to pull out messages
> from /sys/kernel/debug/tracing/trace and filter them on reading instead
> of on writing?

FYI, you can mount the tracing directory without having to mount the
debug directory.

 mount -t tracefs nodev /sys/kernel/tracing

This way you don't need to mount everyone's debugging features just to
access tracing.

-- Steve
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