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| author | Peter Zijlstra <peterz@infradead.org> | 2023-05-31 16:39:07 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-06-05 21:11:03 +0200 |
| commit | 1c06918788e8ae6e69e4381a2806617312922524 (patch) | |
| tree | 0f582e1893af5014808f0b1ac5e012f685b64861 /mm | |
| parent | d5e1586617be7093ea3419e3fa9387ed833cdbb1 (diff) | |
sched: Consider task_struct::saved_state in wait_task_inactive()
With the introduction of task_struct::saved_state in commit
5f220be21418 ("sched/wakeup: Prepare for RT sleeping spin/rwlocks")
matching the task state has gotten more complicated. That same commit
changed try_to_wake_up() to consider both states, but
wait_task_inactive() has been neglected.
Sebastian noted that the wait_task_inactive() usage in
ptrace_check_attach() can misbehave when ptrace_stop() is blocked on
the tasklist_lock after it sets TASK_TRACED.
Therefore extract a common helper from ttwu_state_match() and use that
to teach wait_task_inactive() about the PREEMPT_RT locks.
Originally-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lkml.kernel.org/r/20230601091234.GW83892@hirez.programming.kicks-ass.net
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions