[Intel-wired-lan] [PATCH v3 0/1] multi-threading device shutdown
gregkh at linuxfoundation.org
Mon May 14 15:03:36 UTC 2018
On Mon, May 07, 2018 at 11:54:01AM -0400, Pavel Tatashin wrote:
> v2 - v3
> - Fixed warning from kbuild test.
> - Moved device_lock/device_unlock inside device_shutdown_tree().
> v1 - v2
> - It turns out we cannot lock more than MAX_LOCK_DEPTH by a single
> thread. (By default this value is 48), and is used to detect
> deadlocks. So, I re-wrote the code to only lock one devices per
> thread instead of pre-locking all devices by the main thread.
> - Addressed comments from Tobin C. Harding.
> - As suggested by Alexander Duyck removed ixgbe changes. It can be
> done as a separate work scaling RTNL mutex.
> Do a faster shutdown by calling dev->*->shutdown(dev) in parallel.
> device_shutdown() calls these functions for every single device but
> only using one thread.
> Since, nothing else is running on the machine by the device_shutdown()
> s called, there is no reason not to utilize all the available CPU
Ah, we can hope so. I bet this is going to break something, so can we
have some way of turning it on/off dynamically for when it does?
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