Re: [PATCHSET] workqueue: implement and use WQ_UNBOUND

[David Howells]

Tejun Heo <tj@xxxxxxxxxx> wrote:

> Each gcwq keeps track of currently running works in a hash table and looks
> whether the work in question is already executing before starting executing
> it.  It's a bit complex but as a work_struct may be freed once execution
> starts, the status needs to be tracked outside.

Thanks, that's what I wanted to know.

I presume this survives an executing work_struct being freed, reallocated and
requeued before the address of the work_struct is removed from the hash table?

I can see at least one way of doing this: marking the work_struct address in
the hash when the address becomes pending again so that the process of hash
removal will cause the work_struct to be requeued automatically.

David
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