Re: [PATCH v5 11/17] perf: Simplify get_perf_callchain() user logic

Steven Rostedt <[email protected]> Thu, 24 Apr 2025 13:47:27 -0400

Newsgroups	org.kernel.vger.linux-toolchains,org.kernel.vger.linux-kernel,org.kernel.vger.linux-perf-users,org.kernel.vger.linux-trace-kernel
Message-ID	<[email protected]>

On Thu, 24 Apr 2025 13:42:16 -0400
Mathieu Desnoyers <[email protected]> wrote:

> The case I'd be careful about is if the code can nest over exit_mm()
> (e.g. interrupt) after it sets current->mm = NULL.

Then probably we should always check if current->mm is non-NULL before
using it then, and not rely on just task->flags.

-- Steve