Hey Josef,
Since we are in the memory reclaim path we need our recv work to be on a
workqueue that has WQ_MEM_RECLAIM set so we can avoid deadlocks. Also
set WQ_HIGHPRI since we are in the completion path for IO.
Really a workqueue per device?? Did this really give performance
advantage? Can this really scale with number of devices?
I don't see why not, especially since these things run the whole time the
device is active. I have patches forthcoming to make device creation dynamic
so we don't have a bunch all at once. That being said I'm not married to the
idea, just seemed like a good idea at the time and not particularly harmful.
Thanks,
I just don't see how having a worqueue per device helps anything? There
are plenty of active workers per workqueue and even if its not enough
you can specify more with max_active.
I guess what I'm trying to say is that I don't understand what this is
solving. The commit message explains why you need WQ_MEM_RECLAIM and why
you want WQ_HIGHPRI, but does not explain why workqueue per device is
helping/solving anything.
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