Re: [PATCH v6 11/18] perf: Use current->flags & PF_KTHREAD instead of current->mm == NULL
Josh Poimboeuf <[email protected]> Fri, 25 Apr 2025 08:09:55 -0700
| Newsgroups | org.kernel.vger.linux-toolchains,org.kernel.vger.linux-kernel,org.kernel.vger.linux-perf-users,org.kernel.vger.linux-trace-kernel |
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| Message-ID | <2fjdalrdgadbt6kmv7wgbc2vs42ojkwh2vj6yfwlttmoo2rijs@5gtrvow66g7m> |
On Fri, Apr 25, 2025 at 10:54:33AM -0400, Steven Rostedt wrote: > From: Steven Rostedt <[email protected]> > > To determine if a task is a kernel thread or not, it is more reliable to > use (current->flags & PF_KTHREAD) than to rely on current->mm being NULL. > That is because some kernel tasks (io_uring helpers) may have a mm field. There's a current->mm check in the user space unwinder (patch 1) which should probably also be converted. -- Josh