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

[Steven Rostedt]

On Fri, 08 Sep 2023 14:14:20 +0200
Sven Schnelle <svens@xxxxxxxxxxxxx> wrote:

> Ajay Kaher <akaher@xxxxxxxxxx> 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@xxxxxxxxxx>
> > Co-developed-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> > Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> > Tested-by: Ching-lin Yu <chinglinyu@xxxxxxxxxx>
> > ---
> >  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@xxxxxxxxxxx/

-- Steve