diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2025-09-22 15:46:27 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-10-29 10:29:55 +0100 |
| commit | ae577ea0bc5249c483da09670f784dbc288c80b6 (patch) | |
| tree | b891c2b7b7d3b139d73d6b83467517a52a392932 /kernel/exit.c | |
| parent | 52a1ec718b3eb6da29a76d05a662365a997139cc (diff) | |
unwind: Add comment to unwind_deferred_task_exit()
Explain why unwind_deferred_task_exit() exist and its constraints.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://patch.msgid.link/20250924080118.893367437@infradead.org
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 9f74e8f1c431..5f6e78e28e8a 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -939,7 +939,6 @@ void __noreturn do_exit(long code) tsk->exit_code = code; taskstats_exit(tsk, group_dead); - unwind_deferred_task_exit(tsk); trace_sched_process_exit(tsk, group_dead); /* @@ -950,6 +949,12 @@ void __noreturn do_exit(long code) * gets woken up by child-exit notifications. */ perf_event_exit_task(tsk); + /* + * PF_EXITING (above) ensures unwind_deferred_request() will no + * longer add new unwinds. While exit_mm() (below) will destroy the + * abaility to do unwinds. So flush any pending unwinds here. + */ + unwind_deferred_task_exit(tsk); exit_mm(); |