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EFA: P4d compatibility, same-node loopback, and completion-error reporting (re-port of #3391) - #4734

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dmvevents wants to merge 5 commits into

meta-pytorch:mainfrom

dmvevents:efa-p4d-loopback-mainport

Commits on Aug 22, 2026

Leave an EFA device that cannot do RDMA to another backend
dmvevents
committed
2e50a18
Serve a same-node EFA transfer with a copy instead of a work request
dmvevents
committed
99447c2
Report the root cause of a failed op, not the flush behind it
dmvevents
committed
64fe1f6
Honor the signaled flag on the EFA post path
dmvevents
committed
d01cdd3
Write down what EFA does differently
dmvevents
committed
9474ca0