Tim Robbins wrote:
On Fri, Jan 10, 2003 at 01:30:16AM -0800, Juli Mallett wrote:If I ensure the write only happens after the child is waiting on kq, the bug does not show up for me.
>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
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