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SubjectRe: Is sendfile all that sexy?

On Tue, 16 Jan 2001, Felix von Leitner wrote:

> I don't know how Linux does it, but returning the first free file
> descriptor can be implemented as O(1) operation.

only if special allocation patters are assumed. Otherwise it cannot be a
generic O(1) solution. The first-free rule adds an implicit ordering to
the file descriptor space, and this order cannot be maintained in an O(1)
way. Linux can allocate up to a million file descriptors.

Ingo

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