Date: Mon, 28 Aug 2017 18:40:26 +0000 (UTC) From: Alan Somers <asomers@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r322974 - stable/11/lib/libc/sys Message-ID: <201708281840.v7SIeQQ7081369@repo.freebsd.org>
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Author: asomers Date: Mon Aug 28 18:40:26 2017 New Revision: 322974 URL: https://svnweb.freebsd.org/changeset/base/322974 Log: 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 Modified: stable/11/lib/libc/sys/kqueue.2 Modified: stable/11/lib/libc/sys/kqueue.2 ============================================================================== --- stable/11/lib/libc/sys/kqueue.2 Mon Aug 28 18:01:36 2017 (r322973) +++ stable/11/lib/libc/sys/kqueue.2 Mon Aug 28 18:40:26 2017 (r322974) @@ -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 ,
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