Re: [PATCH v4 09/10] eventfs: Move tracing/events to eventfs

Steven Rostedt
2023-09-08T12:31:44Z

On Fri, 08 Sep 2023 14:14:20 +0200
Sven Schnelle <svens@linux.ibm.com> wrote:

> Ajay Kaher <akaher@vmware.com> writes:
>
> > Till now /sys/kernel/debug/tracing/events is a part of tracefs,
> > with-in this patch creating 'events' and it's sub-dir as eventfs.
> > Basically replacing tracefs calls with eventfs calls for 'events'.
> >
> > Signed-off-by: Ajay Kaher <akaher@vmware.com>
> > Co-developed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> > Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> > Tested-by: Ching-lin Yu <chinglinyu@google.com>
> > ---
> > fs/tracefs/inode.c | 18 ++++++++++
> > include/linux/trace_events.h | 1 +
> > kernel/trace/trace.h | 2 +-
> > kernel/trace/trace_events.c | 67 +++++++++++++++++++-----------------
> > 4 files changed, 55 insertions(+), 33 deletions(-)
>
> With this patchset in next-20230908 the following crash is observed on
> s390 while running ftracetest test.d/instances/instance-event.tc:
>
> (It also crashes without KASAN, just not on every try)

Yep, and I've spent the last few days fixing this :-)

https://lore.kernel.org/linux-trace-kernel/20230907024710.866917011@goodmis.org/

-- Steve