[perf]: register a real backward for FA2 default + masked/varlen custom ops (training-under-compile) - #1388

[perf]: register a real backward for FA2 default + masked/varlen custom ops (training-under-compile)#1388

mergify[bot] merged 6 commits into

hao-ai-lab:mainhao-ai-lab/FastVideo:mainfrom

Mister-Raggs:perf/flash-attn-fa2-real-backwardMister-Raggs/FastVideo:perf/flash-attn-fa2-real-backwardCopy head branch name to clipboard