linux-kernel - Re: [PATCH v6 1/2] scripts: ftrace - move the sort-processing in ftrace

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Message-ID: <4172710c-58ad-a674-b892-868a13c4a149@linux.alibaba.com>
Date:   Tue, 7 Dec 2021 09:29:27 +0800
From:   Yinan Liu <yinan@...ux.alibaba.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     peterz@...radead.org, mark-pk.tsai@...iatek.com, mingo@...hat.com,
        linux-kernel@...r.kernel.org,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: Re: [PATCH v6 1/2] scripts: ftrace - move the sort-processing in
 ftrace_init

>> After applying this, I get a failure on the kprobe self tests at boot up:
>>
>>   Testing ftrace filter: OK
>>   trace_kprobe: Testing kprobe tracing:
>>   trace_kprobe: Could not probe notrace function kprobe_trace_selftest_target
>>   ------------[ cut here ]------------
>>   WARNING: CPU: 2 PID: 1 at kernel/trace/trace_kprobe.c:1973 kprobe_trace_self_tests_init+0x5c/0x497
>>   Modules linked in:
> 
> And I added the below patch, and it shows that the section is not properly
> sorted. Something went wrong with your sorting.
> 
> I plan on keeping this check, at least as a compile option, to make sure
> that the output is sorted, otherwise things will silently fail if they are
> not.
> 
> This patch produced:
> 
> [    1.315419] ftrace: allocating 43510 entries in 170 pages
> [    1.320638] ------------[ cut here ]------------
> [    1.325227] [3] x86_pnpbios_disabled+0x0/0x1c at 8a51c707 is not sorted with __traceiter_initcall_level+0x0/0x60 at 87000660
> 
> I'm dropping the patches until this is "sorted out" :-)
> 
> -- Steve
>
Hi, steven

Sorry, I just saw the email yesterday. Recently my computer is not 
around. I'm not sure what went wrong at the moment. I will fix it.



Best regards!
-- Yinan Liu