upcall

基本解釋

Each upcall appears to be a return from kse_init().
每個(gè)回調(diào)作為kse_init()產(chǎn)生一個(gè)返回值。
Basically, there is only one upcall, with information as to what events caused it available from a pre_agreed mailbox.
基本上，只有一個(gè)回調(diào)，帶著來(lái)自一個(gè)預(yù)先設(shè)定的信箱信息，信息說(shuō)明在什么事件發(fā)生時(shí)，線程可用。
The stack on which kse_init() is called must never be unwound, since the kernel fakes up a context at the point where kse_init() is called for each upcall.
調(diào)用kse_init()的堆棧永遠(yuǎn)不能被釋放，因?yàn)樵谡{(diào)用kse_init()的地方，內(nèi)核為每一個(gè)回調(diào)偽造了一個(gè)上下文。
I'll hang upcall you back, OK?
我先掛了，回頭再打給你，好嗎？