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The Go programming language
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Tying preemption to stack splits means that we have to able to complete the call to exitsyscall (inside cgocallbackg at least for now) without any stack split checks, meaning that the whole sequence has to work within 128 bytes of stack, unless we increase the size of the red zone. This CL frees up 24 bytes along that critical path on amd64. (The 32-bit systems have plenty of space because all their words are smaller.) R=dvyukov CC=golang-dev https://golang.org/cl/11676043 |
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