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workqueue: Rename rescuer kworker

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Each CPU-specific and unbound kworker kthread conforms to a particular
naming scheme. However, this does not extend to the rescuer kworker.
At present, a rescuer kworker is simply named according to its
workqueue's name. This can be cryptic.

This patch modifies a rescuer to follow the kworker naming scheme.
The "R" is indicative of a rescuer and after "-" is its workqueue's
name e.g. "kworker/R-ext4-rsv-conver".

tj: Use "R" instead of "r" as the prefix to make it more distinctive and
    consistent with how highpri pools are marked.

Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Aaron Tomlin 2023-08-08 13:03:29 +01:00 committed by Tejun Heo
parent 523a301e66
commit b6a46f7263
1 changed files with 1 additions and 1 deletions
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2
kernel/workqueue.c
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@ -4642,7 +4642,7 @@ static int init_rescuer(struct workqueue_struct *wq)
}
rescuer->rescue_wq = wq;
rescuer->task = kthread_create(rescuer_thread, rescuer, "%s", wq->name);
rescuer->task = kthread_create(rescuer_thread, rescuer, "kworker/R-%s", wq->name);
if (IS_ERR(rescuer->task)) {
ret = PTR_ERR(rescuer->task);
pr_err("workqueue: Failed to create a rescuer kthread for wq \"%s\": %pe",