linux-kernel - Re: [PATCH 5/6] ftrace: replace do_for_each_ftrace_rec() with for_ftrace_rec

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Date:   Thu, 8 Oct 2020 03:34:40 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Wei Yang <richard.weiyang@...ux.alibaba.com>, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] ftrace: replace do_for_each_ftrace_rec() with
 for_ftrace_rec_iter()

On Tue, Oct 06, 2020 at 10:42:17AM -0400, Steven Rostedt wrote:
>On Mon, 31 Aug 2020 11:11:03 +0800
>Wei Yang <richard.weiyang@...ux.alibaba.com> wrote:
>
>> Now we have two similar infrastructure to iterate ftrace_page and
>> dyn_ftrace:
>> 
>>   * do_for_each_ftrace_rec()
>>   * for_ftrace_rec_iter()
>> 
>> The 2nd one, for_ftrace_rec_iter(), looks more generic, so preserve it
>> and replace do_for_each_ftrace_rec() with it.
>> 
>
>I also didn't pull in this patch. The reason is that the
>for_ftrace_rec_iter() is specific for external usage (for archs to use) and
>requires two function calls to do the iterations.
>
>The do_for_each_ftrace_rec() is a faster, light weight version, but for
>internal use only.
>
>I rather keep both, as each has their own, but slightly different, use
>cases.
>

Got it, thanks

>-- Steve

-- 
Wei Yang
Help you, Help me