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SubjectRe: UDP recvmsg blocks after select(), 2.6 bug?
From: "Alan Cox" <>
Sent: Wednesday, October 06, 2004 20:23
> On Mer, 2004-10-06 at 20:30, Andries Brouwer wrote:
> > A descriptor shall be considered ready for reading when a
> > call to an input function with O_NONBLOCK clear would not
> > block, whether or not the function would transfer data
> > successfully. (The function might return data, an end-of-
> > file indication, or an error other than one indicating
> > that it is blocked, and in each of these cases the
> > descriptor shall be considered ready for reading.)
> >
> > As far as I can interpret these sentences, Linux does not conform.
> Nor does anything else in that case. I guess we need a POSIX_ME_HARDER
> socket option.

The default should be a POSIX compliant socket IMHO; a POSIX_ME_NOT
option could provide better performance.


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