linux-kernel - [PATCH 0/3] Deferrable timers support for timerfd API

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Message-id: <1388687448-12987-1-git-send-email-a.perevalov@samsung.com>
Date:	Thu, 02 Jan 2014 22:30:45 +0400
From:	Alexey Perevalov <a.perevalov@...sung.com>
To:	linux-kernel@...r.kernel.org, john.stultz@...aro.org
Cc:	Alexey Perevalov <a.perevalov@...sung.com>, anton@...msg.org,
	kyungmin.park@...sung.com, akpm@...ux-foundation.org
Subject: [PATCH 0/3] Deferrable timers support for timerfd API

Hello dear community.

This is reworked patch set of original Anton's Vorontsov
proposal regarding unified deferrable timers in user space.
http://lwn.net/Articles/514707/

I decided to resubmit it due we found it usefull for us too.

timerfd was modified since Anton's commit, Alarm support was added.
This isn't only rebase. Anton's previous version used deferrable timer
in couple with hrtimer. This version uses only deferrable timer. It
mean the behaviour of overrun number is different.
e.g. if you don't poll one second timer for a 10 seconds - you'll get
10 overruns with hrtimer, but in deferrable only version you'll get
only one overrun.

This version introduces new clockid (CLOCK_DEFERRABLE) , for timerfd_create, instead of
new flag (TFD_TIMER_DEFERRABLE) for timerfd_settime introduced in previous version.

Anton Vorontsov (3):
  kernel/time: Add new helpers to convert ktime to/from jiffies
  timerfd: Factor out timer-type unspecific timerfd_expire()
  timerfd: Add support for deferrable timers

 fs/timerfd.c              |   97 ++++++++++++++++++++++++++++++++++-----------
 include/linux/jiffies.h   |    4 +-
 include/linux/ktime.h     |    3 +-
 include/uapi/linux/time.h |    1 +
 kernel/time.c             |   23 +++++++++++
 5 files changed, 102 insertions(+), 26 deletions(-)

-- 
1.7.9.5

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