K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2012-02-29T06:19:00.460339Z
K 7
svn:log
V 1001
MFC 230857:

If multiple threads call kevent() to get AIO events on same kqueue fd,
it is possible that a single AIO event will be reported to multiple
threads, it is not threading friendly, and the existing API can not
control this behavior.
Allocate a kevent flags field sigev_notify_kevent_flags for AIO event
notification in sigevent, and allow user to pass EV_CLEAR, EV_DISPATCH
or EV_ONESHOT to AIO kernel code, user can control whether the event
should be cleared once it is retrieved by a thread. This change should
be comptaible with existing application, because the field should have
already been zero-filled, and no additional action will be taken by
kernel.

PR:	kern/156567

MFC 231006:

Add 32-bit compat code for AIO kevent flags introduced in revision 230857.

MFC 231724:

Add notes about sigev_notify_kevent_flags introduced in revision 230857
which enables thread-friendly polling on same fd for AIO events.

Reviewed by:	delphij

MFC 231777:

Bump .Dd date for previous revision.

END