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X-OriginatorOrg: intel.com X-Stat-Signature: 5uz5z7o6wb6bjq15wpgmyncrnn7416a7 X-Rspam-User: X-Rspamd-Queue-Id: CE745C000E X-Rspamd-Server: rspam08 X-HE-Tag: 1768508174-733706 X-HE-Meta: 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 vL9IM+T+ 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as we can :) CPUs have tended to eat the value of simple DMA offload operations like copy/zero over time. In the case of this patch there is no async-offload benefit because userspace is already charged with spawning more threads if it wants more parallelism. For sync-offload one engine may be able to beat a single CPU, but now you have created bandwidth contention problems with a component that is less responsive to the scheduler. Call me skeptical. Signed, someone with async_tx and dmaengine battle scars.