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SubjectRe: [PATCH] sys_epoll system call interface to /dev/epoll

On Fri, 18 Oct 2002, Davide Libenzi wrote:
>
> Linus, yesterday I was sugesting Hanna to use most of the existing code
> and to make :
>
> int sys_epoll_create(int maxfds);
>
> to actually return an fd. Basically during this function call the code
> allocates a file*, initialize it, allocates a free fd, maps the file* to
> the fd, creates the vma* for the shared events area between the kernel and
> user space, maps allocated kernel pages to the vma*, install the vma* and
> returns the fd.

But that's what her patch infrastructure seems to do. It's not just
epoll_create(), it's all the other ioctl's too (unlink, remove etc). One
queston is whether there is one epoll system call (that multiplexes, like
in Hanna's patch) or many. I personally don't like multiplexing system
calls - the system call number _is_ a multiplexor, I don't see the point
of having multiple levels.

Linus

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