linux-kernel - Re: [PATCH v2] ftrace: Do not over-allocate ftrace memory

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Message-ID: <20260106195241.166f4115@fedora>
Date: Tue, 6 Jan 2026 19:52:41 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland
 <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ftrace: Do not over-allocate ftrace memory

On Tue,  6 Jan 2026 16:24:28 -0800
Guenter Roeck <linux@...ck-us.net> wrote:

>  	if (pg_unuse) {
> -		unsigned long pg_remaining, remaining = 0;
> -		unsigned long skip;
> -
> -		/* Count the number of entries unused and compare it to skipped. */
> -		pg_remaining = (ENTRIES_PER_PAGE << pg->order) - pg->index;
> -

The above needs to be fixed though.

-- Steve