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Date:   Sun, 8 Oct 2017 14:42:14 -0400
From:   Steven Rostedt <>
To:     Joel Fernandes <>
Cc:     Linux Kernel Mailing List <>,
        Ingo Molnar <>,
        Andrew Morton <>,
        Jessica Yu <>,
        "Joel Fernandes (Google)" <>
Subject: Re: [for-next][PATCH 15/16] ftrace: Add freeing algorithm to free

On Sun, 8 Oct 2017 01:42:15 -0700
Joel Fernandes <> wrote:

> Hi Steve,
> > "Joel Fernandes (Google)" <> wrote:  
> [..]
> > Also could you let me know what is the correct behavior of the filters
> > after a module being traced is unloaded, are the filters supposed to
> > be setup again after the module is unloaded, before the module can be
> > loaded again?  
> Actually I learnt that it doesn't get preserved and wrote a patch to fix that, let me know
> what you think, thanks. (its only lightly tested - checked that the filters are preserved,
> will do more testing tomorrow):

They should not be preserved, it's too non-deterministic.

I'm wondering why the setting of the ip to zero didn't keep it from
showing up again. I'll have to investigate that.

-- Steve

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