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 <gorcu...@openvz.org>
CC: Michael Kerrisk <mtk.manpa...@gmail.com>
CC: Thomas Gleixner <t...@linutronix.de>
CC: Andrew Morton <a...@linux-foundation.org>
CC: Andrey Vagin <ava...@openvz.org>
CC: Pavel Emelyanov <xe...@parallels.com>
CC: Vladimir Davydov <vdavy...@parallels.com>
CC: linux-...@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
--
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