Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932739AbbDMT4e (ORCPT ); Mon, 13 Apr 2015 15:56:34 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:33589 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754462AbbDMT4a (ORCPT ); Mon, 13 Apr 2015 15:56:30 -0400 Message-ID: <552C1F64.30202@gmail.com> Date: Mon, 13 Apr 2015 21:56:20 +0200 From: "Michael Kerrisk (man-pages)" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: Cyrill Gorcunov , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org CC: mtk.manpages@gmail.com, Thomas Gleixner , Andrew Morton , Andrey Vagin , Pavel Emelyanov , Vladimir Davydov Subject: Re: [patch 4/4] timerfd.2: Add ioctl method description References: <20140715215451.499191426@openvz.org> <20140715215703.353177995@openvz.org> In-Reply-To: <20140715215703.353177995@openvz.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2423 Lines: 70 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@vger.kernel.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/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/