Daniel C. Sobral wrote:
Tim Robbins wrote:
> On Fri, Jan 10, 2003 at 01:30:16AM -0800, Juli Mallett wrote:
>
>
> >Lately, the data field for sockets, which holds bytes ready (in the
> EVFILT_
> >READ case) to be read, is computed to be zero. This means that if
> you have
> >a low watermark which is >0 per the kq, THE EVENT WILL NEVER HAPPEN.
> Not to
> >mention that this means when the event IS triggered properly (if
you can
> >call it that), it is always said to have =ZERO= bytes ready.
>
> [...]
>
> I can definitely reproduce this here and also fairly angry about it.
> In addition to what you mentioned, fstat() gives an incorrect st_size
> result now and it's likely that non-NOTE_LOWAT low watermarks are
> firing too early as well.
>
> Ugly test program @ http://people.freebsd.org/~tjr/kq.c
If I ensure the write only happens after the child is waiting on kq, the
bug does not show up for me.
...because the close() wakes kevent.
Indeed, this is completely reproducable here (RELENG_5_0).
--
Daniel C. Sobral (8-DCS)
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