linux-kernel - Re: [PATCH] x86/tracing: introduce enter/exit tracepoint pairs for page faults

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Message-ID: <214abd94-7fb3-4515-a1ae-a60abe81af88@intel.com>
Date: Mon, 14 Apr 2025 13:42:23 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Junxuan Liao <ljx@...wisc.edu>, linux-trace-kernel@...r.kernel.org,
 linux-kernel@...r.kernel.org, x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>, Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 "Paul E. McKenney" <paulmck@...nel.org>
Subject: Re: [PATCH] x86/tracing: introduce enter/exit tracepoint pairs for
 page faults

On 4/14/25 13:35, Junxuan Liao wrote:
> Rename page_fault_{user,kernel} to page_fault_{user,kernel}_enter, and
> add the exit counterparts. This might be useful for measuring page fault
> handling latencies.

Is there a reason kprobes don't work for this?