linux-kernel - Re: [PATCH] perf ftrace: Use process/session specific trace settings

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Message-ID: <20250516184347.32c0454a@batman.local.home>
Date: Fri, 16 May 2025 18:43:47 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Thomas Richter <tmricht@...ux.ibm.com>,
 linux390-list@...maker.boeblingen.de.ibm.com, sumanthk@...ux.ibm.com,
 hca@...ux.ibm.com, agordeev@...ux.ibm.com, gor@...ux.ibm.com, Alexander
 Egorenkov <egorenar@...ux.ibm.com>, linux-perf-users@...r.kernel.org, Linux
 Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf ftrace: Use process/session specific trace
 settings

On Fri, 16 May 2025 16:09:57 -0300
Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> Yeah, you can just call rmdir and be done with it :-)

Yes. Removing an instance should reset everything about it before it
removes it. It disables events and sets the current tracer to "nop"
(stopping function tracing and such if it was present).

If there's a file open, then the rmdir should fail with -EBUSY.

-- Steve