linux-kernel - Re: [PATCH v15 0/4] trace: Introduce objtrace trigger to trace the kernel object

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Message-ID: <CAEr6+EArZtwJPwZnKAB_61a=khPpC1=6ogqEC8r4npaaX0WvjA@mail.gmail.com>
Date:   Sat, 17 Dec 2022 16:27:59 +0800
From:   Jeff Xie <xiehuan09@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     mingo@...hat.com, mhiramat@...nel.org, zanussi@...nel.org,
        linux-kernel@...r.kernel.org, chensong_2000@....cn
Subject: Re: [PATCH v15 0/4] trace: Introduce objtrace trigger to trace the
 kernel object

On Wed, Nov 30, 2022 at 12:30 AM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> On Wed, 30 Nov 2022 00:09:51 +0800
> Jeff Xie <xiehuan09@...il.com> wrote:
>
> > > Now instead of searching the function arguments for "obj", we should just
> > > read the obj value at every function and report when it changed, as well as
> > > the last function it was still the same. The report will be like the
> > > "func_repeats" entry. And instead we can print when the object changes,
> > > something like this:
> > >
> > >               cat-117     [002] ...2.     1.602245: bio_add_page <-ext4_mpage_readpages object:0xffff88811bee4000 value:0x2000 (last value:0x1000 at [002] __bio_add_page <-bio_add_page ts: 1.602245)
> >
> >
> > I'm just curious if we'll see this rewritten version in the next merge
> > window  ;-)
>
> Unfortunately, this ended up getting dropped in priority, as my workload
> increased internally. :-/

Hope you have multiple trips to London and more time on the plane to
get this done  ;-)

>
> -- Steve


-- 
Thanks,
JeffXie