From: Cyrill Gorcunov <gorcunov@openvz.org>
To: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org
Cc: Michael Kerrisk <mtk.manpages@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andrey Vagin <avagin@openvz.org>,
Pavel Emelyanov <xemul@parallels.com>,
Vladimir Davydov <vdavydov@parallels.com>
Subject: [patch 4/4] timerfd.2: Add ioctl method description
Date: Wed, 16 Jul 2014 01:54:55 +0400 [thread overview]
Message-ID: <20140715215703.353177995@openvz.org> (raw)
In-Reply-To: 20140715215451.499191426@openvz.org
[-- Attachment #1: timerfd-man --]
[-- Type: text/plain, Size: 1806 bytes --]
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.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Michael Kerrisk <mtk.manpages@gmail.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Andrey Vagin <avagin@openvz.org>
CC: Pavel Emelyanov <xemul@parallels.com>
CC: Vladimir Davydov <vdavydov@parallels.com>
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
next prev parent reply other threads:[~2014-07-15 21:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 21:54 [patch 0/4] timerfd c/r support, v5 Cyrill Gorcunov
2014-07-15 21:54 ` [patch 1/4] timerfd: Implement show_fdinfo method Cyrill Gorcunov
2014-07-15 21:54 ` [patch 2/4] docs: procfs -- Document timerfd output Cyrill Gorcunov
2014-07-15 21:54 ` [patch 3/4] timerfd: Implement timerfd_ioctl method to restore timerfd_ctx::ticks, v3 Cyrill Gorcunov
2014-07-15 21:54 ` Cyrill Gorcunov [this message]
[not found] ` <20140715215703.353177995-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
2015-04-13 19:56 ` [patch 4/4] timerfd.2: Add ioctl method description Michael Kerrisk (man-pages)
[not found] ` <552C1F64.30202-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-04-13 20:10 ` Cyrill Gorcunov
-- strict thread matches above, loose matches on Subject: below --
2014-06-23 18:54 [patch 0/4] timerfd c/r support, v4 Cyrill Gorcunov
2014-06-23 18:54 ` [patch 4/4] timerfd.2: Add ioctl method description Cyrill Gorcunov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140715215703.353177995@openvz.org \
--to=gorcunov@openvz.org \
--cc=akpm@linux-foundation.org \
--cc=avagin@openvz.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mtk.manpages@gmail.com \
--cc=tglx@linutronix.de \
--cc=vdavydov@parallels.com \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).