On Tue, Mar 18, 2025 at 12:48:44PM -0600, Jens Axboe wrote: > > though I don't see any examples of drivers using it. Would it be a bad > > idea to try and reuse that? > > We can't reuse that one, and it's not for driver use - purely internal. > But I _think_ you could easily grab space in the union that has the hash > and ipi_list for it. And then you could dump needing this extra data per > request. Another idea is to union the refcount with end_io_data, since that's purely for the driver. But it might be a bit weird to tell drivers that they can use either end_io/end_io_data or the refcount but not both... not to mention it could be a nice exploit vector if drivers get it wrong. Either way, I think this work is follow-on material and shouldn't be rolled into this patch.
