Re: [PATCH 0 of 4] Generic AIO by scheduling stacks

[Eric Dumazet]

Linus Torvalds a écrit :
> Ok, here's another entry in this discussion.

>  - IF the system call blocks, we call the architecture-specific 
>    "schedule_async()" function before we even get any scheduler locks, and 
>    it can just do a fork() at that time, and let the *child* return to the 
>    original user space. The process that already started doing the system 
>    call will just continue to do the system call.


Well, I guess if the original program was mono-threaded, and syscall used 
fget_light(), we might have a problem here if the child try a close(). So you 
may have to disable fget_light() magic if async call is the originator of the 
syscall.

Eric
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