Re: [PATCH v3] slow-work: add (module*)work->owner to fix races with module clients

[David Howells]

Gregory Haskins <ghaskins@xxxxxxxxxx> wrote:

> The slow_work facility was designed to use reference counting instead of
> barriers for synchronization.  The reference counting mechanism is
> implemented as a vtable op (->get_ref, ->put_ref) callback.  This is
> problematic for module use of the slow_work facility because it is
> impossible to synchronize against the .text installed in the callbacks:
> There is no way to ensure that the slow-work threads have completely
> exited the .text in question and rmmod may yank it out from under the
> slow_work thread.

This seems reasonable.  I'll get round to testing it if I can find the OOM bug
that's nobbling by test machine.

David
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