linux-kernel - Re: [PATCH v4 00/10] tracing: introducing eventfs

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Message-ID: <20230721151409.212791c0@gandalf.local.home>
Date:   Fri, 21 Jul 2023 15:14:09 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Ajay Kaher <akaher@...are.com>
Cc:     "shuah@...nel.org" <shuah@...nel.org>,
        "mhiramat@...nel.org" <mhiramat@...nel.org>,
        Ching-lin Yu <chinglinyu@...gle.com>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, lkp@...el.com,
        Nadav Amit <namit@...are.com>,
        "oe-lkp@...ts.linux.dev" <oe-lkp@...ts.linux.dev>,
        Alexey Makhalov <amakhalov@...are.com>,
        "er.ajay.kaher@...il.com" <er.ajay.kaher@...il.com>,
        "srivatsa@...il.mit.edu" <srivatsa@...il.mit.edu>,
        Tapas Kundu <tkundu@...are.com>,
        Vasavi Sirnapalli <vsirnapalli@...are.com>
Subject: Re: [PATCH v4 00/10] tracing: introducing eventfs

On Fri, 21 Jul 2023 09:18:43 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> OK, I got this working and it appears to pass all my tests. I actually got
> it working Wednesday night, but I tried a different approach on Thursday
> that got rid of the evenfs_file and only used eventfs_inodes and makes the
> files more dynamic. There's still a couple of corner cases that are not
> working with this approach (the dentry counters are getting out of sync).
> This should not stop this from going in. I'll continue working on that
> approach for the next merge cycle. But for now, here's the patch to this
> series that works.

Just figured out my bug with my new design. It was in the eventfs_release()
code, where I have a loop that does the dput on the children, but I wasn't
dput(child), I was dput(parent) in that loop!!

Anyway, for this merge window I much rather have this code in, and for the
next merge window I'll add this update.

I can post the new design too, but first let's focus on this.

-- Steve