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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5f17570354
As a preperation for multiple RX queues change the RBD allocation model. The new model includes a background allocator. The allocator is called by the interrupt handler when there are two released buffers by the queue, and the allocator starts allocating eight pages per request. When the queue has released 8 pages it tries claiming the request. If the pages are not ready - it keeps claiming. This new model should make sure that RBDs are always available across the multiple queues. The RBDs are transferred between the allocator and the queue. The queue moves the free RBDs upon freeing them to the allocator. The allocator moves them back to the queue's possession when the request is claimed. The allocator has an initial pool to make sure there are always RBDs available for the request completion. Release of the buffers at exit is done per pools - the allocator frees its own initial pool and the queue frees its own pool. Existing code refactor - -Queue's initial pool is the size of the queue only as the allocation of the new buffers no longer uses this pool. -Removal of replenish background work, and replenish calls in the interrupt handler and restock(). -The replenish() and the rxq used_list are used only during initialization. -Moved page allocation to a new function for code reuse. New code - Allocator code - new structure and functions. Interrupt handler uses the allocator functions for replenishing buffers. Reuse of the restock() method. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> |
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