From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Kerrisk (man-pages)" Subject: Re: [patch 4/4] timerfd.2: Add ioctl method description Date: Mon, 13 Apr 2015 21:56:20 +0200 Message-ID: <552C1F64.30202@gmail.com> References: <20140715215451.499191426@openvz.org> <20140715215703.353177995@openvz.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140715215703.353177995-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Cyrill Gorcunov , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, Thomas Gleixner , Andrew Morton , Andrey Vagin , Pavel Emelyanov , Vladimir Davydov List-Id: linux-api@vger.kernel.org Hello Cyrill, On 07/15/2014 11:54 PM, Cyrill Gorcunov wrote: > ioctl(2) > The following commands are supported: TFD_IOC_SET_TICKS to adjust > the number of the timer expirations that have occurred. > It take a pointer to nonzero 8-byte integer (uint64_t*) containing > new number of expirations. Once the number is set any waiter on > the timer is woken up. The only purpose of this command is to restore > the expirations in a sake of checkpoint/restore procedure. > It requires the kernel to be built with CONFIG_CHECKPOINT_RESTORE > support. Late... but, patch applied. Thank you. Cheers, Michael > Signed-off-by: Cyrill Gorcunov > CC: Michael Kerrisk > CC: Thomas Gleixner > CC: Andrew Morton > CC: Andrey Vagin > CC: Pavel Emelyanov > CC: Vladimir Davydov > CC: linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > --- > man2/timerfd_create.2 | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > Index: man-pages/man2/timerfd_create.2 > =================================================================== > --- man-pages.orig/man2/timerfd_create.2 > +++ man-pages/man2/timerfd_create.2 > @@ -260,6 +260,20 @@ multiplexing APIs: > and > .BR epoll (7). > .TP > +.BR ioctl "(2)" > +The following commands are supported: > +.B TFD_IOC_SET_TICKS > +to adjust the number of the timer expirations that have occurred. > +It take a pointer to nonzero 8-byte integer > +.RI ( uint64_t *) > +containing the new number of expirations. > +Once the number is set any waiter on the timer is woken up. > +The only purpose of this command is to restore the expirations > +in a sake of checkpoint/restore procedure. > +It requires the kernel to be built with > +.BR CONFIG_CHECKPOINT_RESTORE > +support. > +.TP > .BR close (2) > When the file descriptor is no longer required it should be closed. > When all file descriptors associated with the same timer object > > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/