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From:   Andrey Ryabinin <ryabinin.a.a@gmail.com>
Date:   Wed, 3 May 2023 22:04:21 +0200
Message-ID: <CAPAsAGxcCJai6PpTVOkqAB-vG+Q71hb1exsK79hJ7Kb2eKAtjA@mail.gmail.com>
Subject: Re: [PATCH 00/40] Memory allocation profiling
To:     Tejun Heo <tj@kernel.org>
Cc:     Kent Overstreet <kent.overstreet@linux.dev>,
        Michal Hocko <mhocko@suse.com>,
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On Wed, May 3, 2023 at 6:35=E2=80=AFPM Tejun Heo <tj@kernel.org> wrote:
>
> Hello, Kent.
>
> On Wed, May 03, 2023 at 04:05:08AM -0400, Kent Overstreet wrote:
> > No, we're still waiting on the tracing people to _demonstrate_, not
> > claim, that this is at all possible in a comparable way with tracing.
>
> So, we (meta) happen to do stuff like this all the time in the fleet to h=
unt
> down tricky persistent problems like memory leaks, ref leaks, what-have-y=
ou.
> In recent kernels, with kprobe and BPF, our ability to debug these sorts =
of
> problems has improved a great deal. Below, I'm attaching a bcc script I u=
sed
> to hunt down, IIRC, a double vfree. It's not exactly for a leak but leaks
> can follow the same pattern.
>

For leaks there is example bcc
https://github.com/iovisor/bcc/blob/master/tools/memleak.py