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rcu: Make the grace period workers unbound again

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After a dedicated grace-period workqueue was added to RCU in order to
benefit from rescuer threads, the relevant workers were moved to the new
workqueue away from system_power_efficient_wq. The old workqueue was
unbound, which is desirable for performance reasons. Making the workers
bound measurably regressed performance, so make them unbound again.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Panchajanya1999 <kernel@panchajanya.dev>
(cherry picked from commit 139be6da6ee92c8b0aa2d19081fa230435082054)
(cherry picked from commit 3428cd70087fe5fd538d96e89f8f12266aacc2d1)
(cherry picked from commit b4e1beb3e73ccd6f341f95020becfff0b7139745)
(cherry picked from commit 428f05ee3318ed4314317bb697abec26a4bcc930)
This commit is contained in:
Sultan Alsawaf 2023-01-28 13:16:29 +05:30 • committed by Ksawlii
parent 6112d0b006
commit 27bb889ce3
1 changed files with 3 additions and 3 deletions
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6
kernel/rcu/tree.c
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@ -4607,9 +4607,9 @@ void __init rcu_init(void)
}
/* Create workqueue for expedited GPs and for Tree SRCU. */
rcu_gp_wq = alloc_workqueue("rcu_gp", WQ_MEM_RECLAIM, 0);
WARN_ON(!rcu_gp_wq);
rcu_par_gp_wq = alloc_workqueue("rcu_par_gp", WQ_MEM_RECLAIM, 0);
rcu_gp_wq = alloc_workqueue("rcu_gp", WQ_POWER_EFFICIENT | WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
WARN_ON(!rcu_gp_wq);
rcu_par_gp_wq = alloc_workqueue("rcu_par_gp", WQ_POWER_EFFICIENT | WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
WARN_ON(!rcu_par_gp_wq);
srcu_init();