From: Thomas Gleixner <tglx@linutronix.de>
To: Shrikanth Hegde <sshegde@linux.ibm.com>,
LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Gabriele Monaco <gmonaco@redhat.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Michael Jeanson <mjeanson@efficios.com>,
Jens Axboe <axboe@kernel.dk>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Gautham R. Shenoy" <gautham.shenoy@amd.com>,
Florian Weimer <fweimer@redhat.com>,
Tim Chen <tim.c.chen@intel.com>,
Yury Norov <yury.norov@gmail.com>
Subject: Re: [patch V2 10/20] sched/mmcid: Convert mm CID mask to a bitmap
Date: Mon, 27 Oct 2025 09:57:09 +0100 [thread overview]
Message-ID: <87ikg0wwm2.ffs@tglx> (raw)
In-Reply-To: <6f7b0688-6c92-4901-ab18-d348e667703e@linux.ibm.com>
On Mon, Oct 27 2025 at 11:15, Shrikanth Hegde wrote:
> On 10/22/25 6:25 PM, Thomas Gleixner wrote:
>> static inline void mm_init_cid(struct mm_struct *mm, struct task_struct *p)
>> @@ -1363,7 +1363,7 @@ static inline void mm_init_cid(struct mm
>> mm->mm_cid.nr_cpus_allowed = p->nr_cpus_allowed;
>> raw_spin_lock_init(&mm->mm_cid.lock);
>> cpumask_copy(mm_cpus_allowed(mm), &p->cpus_mask);
>> - cpumask_clear(mm_cidmask(mm));
>> + bitmap_zero(mm_cidmask(mm), cpumask_size());
>
> Could use num_possible_cpus() here? CID are bound to be less than it no?
Probably.
next prev parent reply other threads:[~2025-10-27 8:57 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-22 12:55 [patch V2 00/20] sched: Rewrite MM CID management Thomas Gleixner
2025-10-22 12:55 ` [patch V2 01/20] sched/mmcid: Revert the complex " Thomas Gleixner
2025-10-22 12:55 ` [patch V2 02/20] sched/mmcid: Use proper data structures Thomas Gleixner
2025-10-22 12:55 ` [patch V2 03/20] sched/mmcid: Cacheline align MM CID storage Thomas Gleixner
2025-10-22 12:55 ` [patch V2 04/20] sched: Fixup whitespace damage Thomas Gleixner
2025-10-22 12:55 ` [patch V2 05/20] sched/mmcid: Move scheduler code out of global header Thomas Gleixner
2025-10-22 12:55 ` [patch V2 06/20] sched/mmcid: Prevent pointless work in mm_update_cpus_allowed() Thomas Gleixner
2025-10-22 12:55 ` [patch V2 07/20] cpumask: Introduce cpumask_or_and_calc_weight() Thomas Gleixner
2025-10-23 16:37 ` Yury Norov
2025-10-22 12:55 ` [patch V2 08/20] sched/mmcid: Use cpumask_or_and_calc_weight() Thomas Gleixner
2025-10-23 16:45 ` Yury Norov
2025-10-22 12:55 ` [patch V2 09/20] cpumask: Cache num_possible_cpus() Thomas Gleixner
2025-10-23 16:25 ` Yury Norov
2025-10-22 12:55 ` [patch V2 10/20] sched/mmcid: Convert mm CID mask to a bitmap Thomas Gleixner
2025-10-23 16:46 ` Yury Norov
2025-10-27 5:45 ` Shrikanth Hegde
2025-10-27 8:57 ` Thomas Gleixner [this message]
2025-10-22 12:55 ` [patch V2 11/20] signal: Move MMCID exit out of sighand lock Thomas Gleixner
2025-10-22 12:55 ` [patch V2 12/20] sched/mmcid: Move initialization out of line Thomas Gleixner
2025-10-22 12:55 ` [patch V2 13/20] sched/mmcid: Provide precomputed maximal value Thomas Gleixner
2025-10-22 12:55 ` [patch V2 14/20] sched/mmcid: Serialize sched_mm_cid_fork()/exit() with a mutex Thomas Gleixner
2025-10-22 12:55 ` [patch V2 15/20] sched/mmcid: Introduce per task/CPU ownership infrastrcuture Thomas Gleixner
2025-10-22 12:55 ` [patch V2 16/20] sched/mmcid: Provide new scheduler CID mechanism Thomas Gleixner
2025-10-27 5:11 ` Shrikanth Hegde
2025-10-27 8:54 ` Thomas Gleixner
2025-10-22 12:55 ` [patch V2 17/20] sched/mmcid: Provide CID ownership mode fixup functions Thomas Gleixner
2025-10-22 12:55 ` [patch V2 18/20] irqwork: Move data struct to a types header Thomas Gleixner
2025-10-22 12:55 ` [patch V2 19/20] sched/mmcid: Implement deferred mode change Thomas Gleixner
2025-10-22 12:55 ` [patch V2 20/20] sched/mmcid: Switch over to the new mechanism Thomas Gleixner
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