linux-kernel - Re: [PATCH v5 6/8] selftests: tracing: Add a basic testcase for wprobe

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Message-ID: <af8f3543-4af6-48d7-a55a-bab24b6c7c7a@sirena.org.uk>
Date: Wed, 12 Nov 2025 12:15:03 +0000
From: Mark Brown <broonie@...nel.org>
To: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
	Jinchao Wang <wangjinchao600@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, Aishwarya.TCV@....com
Subject: Re: [PATCH v5 6/8] selftests: tracing: Add a basic testcase for
 wprobe

On Thu, Oct 30, 2025 at 09:09:52AM +0900, Masami Hiramatsu wrote:
> Masami Hiramatsu (Google) <mhiramat@...nel.org> wrote:

> There is a single step execution code but only for default overflow_handlers.
> This is a bit strange becuase other users can not set it up outside of
> the arch dependent code. Even if it can, it is simply redundant.

> So I made changes below which allow users to set its own custom handler is
> compatible with perf default overflow handlers.
> I confirmed this works on both arm and arm64.

I think everyone who knows this code is really snowed under at the
minute - can I suggest posting this as a fix for now?  This is still
broken on arm64, we'll need a fix (or to disable the feature on the
affected arches) one way or another for v6.19.

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