linux-kernel - Re: [PATCH] selftests/ftrace: Disable multiple

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Date:   Tue, 05 Jan 2021 15:42:44 +0530
From:   "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        shuah@...nel.org
Subject: Re: [PATCH] selftests/ftrace: Disable multiple_kprobes test on
 powerpc

Masami Hiramatsu wrote:
> On Tue,  5 Jan 2021 12:27:30 +0530
> "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com> wrote:
> 
>> Not all symbols are blacklisted on powerpc. Disable multiple_kprobes
>> test until that is sorted, so that rest of ftrace and kprobe selftests
>> can be run.
> 
> This looks good to me, but could you try to find the functions
> which should be blocked from kprobes?
> (Usually, the function which are involved in the sw-breakpoint
>  handling, including locks etc.)

Yes, we did add several blacklists some time back, but there has been 
quite a bit of churn in our entry code. I've been meaning to audit it 
for a while now, but this has been blocking tests. It would be nice to 
skip this test for now until I am able to spend some time on this.

Thanks,
Naveen