An idiot using my keyboard wrote:
- AIO requests that are serviced from cache ought to immediately
invoke the callback, in the same thread context as the caller, fixing
up the stack so that the callback returns to the instruction following
the syscall. That way the "immediate completion" path through the
callback can manipulate data structures, allocate memory, etc. just as
if it had followed a synchronous call.
Or, of course:
if (async_stat(entry) == 0) {
... immediate completion code path ...
}
Ugh. But I think the discussion about the delayed path still holds.
- Michael
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