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Date:   Thu, 30 Apr 2020 12:12:22 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc:     Joerg Roedel <jroedel@suse.de>,
        linux-kernel <linux-kernel@vger.kernel.org>,
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        Andrew Morton <akpm@linux-foundation.org>,
        Shile Zhang <shile.zhang@linux.alibaba.com>,
        Andy Lutomirski <luto@amacapital.net>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
Subject: Re: [RFC][PATCH] x86/mm: Sync all vmalloc mappings before
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On Thu, 30 Apr 2020 11:23:29 -0400 (EDT)
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:

> I suspect it's called by:
> 
> include/linux/trace_event.h:trace_trigger_soft_disabled():
> 
> static inline bool
> trace_trigger_soft_disabled(struct trace_event_file *file)
> {
>         unsigned long eflags = file->flags;
> 
>         if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
>                 if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
>                         event_triggers_call(file, NULL, NULL);
>                 if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
>                         return true;
>                 if (eflags & EVENT_FILE_FL_PID_FILTER)
>                         return trace_event_ignore_this_pid(file);
>         }
>         return false;
> }

This code is only used for the "enable/disable event" triggers. Which isn't
the case here. So this should never be called.

-- Steve