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author | asomers <asomers@FreeBSD.org> | 2017-08-28 18:40:26 +0000 |
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committer | asomers <asomers@FreeBSD.org> | 2017-08-28 18:40:26 +0000 |
commit | 409978225fb65151172d133dc2da862bd097a37c (patch) | |
tree | 3e343a50d1fc8e0e19d6e6f5fe11dd61556a617a /lib | |
parent | ff174177e920856a7a605f61aec3e5592cc0d40e (diff) | |
download | FreeBSD-src-409978225fb65151172d133dc2da862bd097a37c.zip FreeBSD-src-409978225fb65151172d133dc2da862bd097a37c.tar.gz |
MFC r320255
(note that part of 320255 was erroneously MFCed by 322889)
Clarify usage of aio(4) with kqueue(2)
Reviewed by: jhb
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D11299
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libc/sys/kqueue.2 | 37 |
1 files changed, 11 insertions, 26 deletions
diff --git a/lib/libc/sys/kqueue.2 b/lib/libc/sys/kqueue.2 index 5ef066c..dd03441 100644 --- a/lib/libc/sys/kqueue.2 +++ b/lib/libc/sys/kqueue.2 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 3, 2016 +.Dd June 22, 2017 .Dt KQUEUE 2 .Os .Sh NAME @@ -335,33 +335,18 @@ identical to the .Dv EVFILT_READ case. .It Dv EVFILT_AIO -The sigevent portion of the AIO request is filled in, with -.Va sigev_notify_kqueue -containing the descriptor of the kqueue that the event should -be attached to, -.Va sigev_notify_kevent_flags -containing the kevent flags which should be -.Dv EV_ONESHOT , -.Dv EV_CLEAR -or -.Dv EV_DISPATCH , -.Va sigev_value -containing the udata value, and -.Va sigev_notify -set to -.Dv SIGEV_KEVENT . -When the -.Fn aio_* -system call is made, the event will be registered -with the specified kqueue, and the -.Va ident -argument set to the -.Fa struct aiocb -returned by the -.Fn aio_* -system call. +Events for this filter are not registered with +.Fn kevent +directly but are registered via the +.Va aio_sigevent +member of an asychronous I/O request when it is scheduled via an asychronous I/O +system call such as +.Fn aio_read . The filter returns under the same conditions as .Fn aio_error . +For more details on this filter see +.Xr sigevent 3 and +.Xr aio 4 . .It Dv EVFILT_VNODE Takes a file descriptor as the identifier and the events to watch for in .Va fflags , |