Re: Syslets, Threadlets, generic AIO support, v6

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Davide Libenzi a écrit :

On Wed, 30 May 2007, Linus Torvalds wrote:


And then the semantics: do these descriptors should show up in
/proc/self/fd?  Are there separate directories for each namespace?  Do
they count against the rlimit?
Oh, absolutely. The'd be real fd's in every way. People could use them 100% equivalently (and concurrently) with the traditional ones. The whole, and the _only_ point, would be that it breaks the legacy guarantees of a dense fd space.
Most apps don't actually *need* that dense fd space in any case. But by defaulting to it, we wouldn't break those (few) apps that actually depend on it.
I agree. What would be a good interface to allocate fds in such area? We don't want to replicate syscalls, so maybe a special new dup function?
If the deal is to be able to get faster open()/socket()/pipe()/... calls by not finding the first 0 bit in a huge bitmap, a better way would be to have a flag in struct task, reset to 0 at exec time. 

A new syscall would say : This process is OK to receive *random* fds.


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