Re: [PATCH v5] KEYS: key_garbage_collector(): process in chunks

[Hillf Danton]

On Thu, 29 Oct 2026 19:29:17 +0200 Jarkko Sakkinen wrote:
> key_garbage_collector() has a design that is not resistant enough for
> workqueue lockups. The duration scales up relative to the number of items
> in the serial tree, which causes a reoccuring theme of being guilty of
> causing workqueue lockups.
>
Given cond_resched() the gc work is not a cpu hog, and given concurrency
workqueue can get individual cpu highly overloaded in short time, so what
you delivered is a half backed croissant, HBC, as you failed to make it
clear why lockup occurs when the number of gc items rockets up.