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 gjKQZgqn 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Peter, On 9/22/2026 3:22 PM, Peter Zijlstra wrote: > On Mon, Sep 21, 2026 at 05:37:22PM -0700, Tim Chen wrote: >> @@ -6395,15 +6429,27 @@ static __always_inline void return_cfs_rq_runtime(struct cfs_rq *cfs_rq); >> >> static void set_delayed(struct sched_entity *se) >> { >> - se->sched_delayed = 1; >> - >> /* >> * Delayed se of cfs_rq have no tasks queued on them. >> * Do not adjust h_nr_runnable since __dequeue_task() >> * will account it for blocked tasks. >> + * >> + * This check can be removed because when flat pick >> + * patches get merged as only task can get delayed, >> + * same for clear_delayed(). >> */ >> - if (!entity_is_task(se)) >> + if (!entity_is_task(se)) { >> + se->sched_delayed = 1; >> return; >> + } > > This is dead code. In Linus' tree, where this will be applied, this can > never happen. A possible backport of this fix however will need to take > care. > Would you prefer that we create a separate patch to remove entity_is_task() for Linus's tree (so that the current patch can be backported, since cache-aware scheduling was merged before flat task-pickup)? thanks, Chenyu