Messages in this thread Patch in this message | | | From | Aaron Tomlin <> | Subject | [PATCH] workqueue: Rename rescuer kworker | Date | Mon, 7 Aug 2023 23:06:37 +0100 |
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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.
From the context of user-mode, it can be useful to identify a rescuer kworker since their CPU affinity cannot be modified and their initial CPU assignment can be safely ignored. By design a rescuer kworker can run anywhere and only processes work items in an emergency situation.
This patch modifies a rescuer to follow the kworker naming scheme. The "r" and "-" is indicative of a rescuer and its workqueue's name respectively e.g. "kworker/r-ext4-rsv-conver".
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com> --- kernel/workqueue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 02a8f402eeb5..d9bb375b8d02 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4599,7 +4599,7 @@ 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", -- 2.39.1
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