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  1. 09 Mar, 2011 1 commit
    • John Stultz's avatar
      RTC: Initialize kernel state from RTC · f44f7f96
      John Stultz authored 
      Mark Brown pointed out a corner case: that RTC alarms should
be allowed to be persistent across reboots if the hardware
supported it.

The rework of the generic layer to virtualize the RTC alarm
virtualized much of the alarm handling, and removed the
code used to read the alarm time from the hardware.

Mark noted if we want the alarm to be persistent across
reboots, we need to re-read the alarm value into the
virtualized generic layer at boot up, so that the generic
layer properly exposes that value.

This patch restores much of the earlier removed
rtc_read_alarm code and wires it in so that we
set the kernel's alarm value to what we find in the
hardware at boot time.

NOTE: Not all hardware supports persistent RTC alarm state across
system reset. rtc-cmos for example will keep the alarm time, but
disables the AIE mode irq. Applications should not expect the RTC
alarm to be valid after a system reset. We will preserve what
we can, to represent the hardware state at boot, but its not
guarenteed.

Further, in the future, with multiplexed RTC alarms, the
soonest alarm to fire may not be the one set via the /dev/rt
ioctls. So an application may set the alarm with RTC_ALM_SET,
but after a reset find that RTC_ALM_READ returns an earlier
time. Again, we preserve what we can, but applications should
not expect the RTC alarm state to persist across a system reset.

Big thanks to Mark for pointing out the issue!
Thanks also to Marcelo for helping think through the solution.

CC: Mark Brown <broonie@opensource.wolfsonmicro.com>
CC: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: rtc-linux@googlegroups.com
Reported-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
      f44f7f96
  3. 08 Mar, 2011 5 commits
  5. 07 Mar, 2011 9 commits
  7. 06 Mar, 2011 5 commits
  9. 05 Mar, 2011 17 commits
  11. 04 Mar, 2011 3 commits
    • Sage Weil's avatar
      ceph: no .snap inside of snapped namespace · 455cec0a
      Sage Weil authored 
      Otherwise you can do things like

# mkdir .snap/foo
# cd .snap/foo/.snap
# ls
<badness>
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      455cec0a
    • Sage Weil's avatar
      libceph: fix msgr standby handling · e00de341
      Sage Weil authored 
      The standby logic used to be pretty dependent on the work requeueing
behavior that changed when we switched to WQ_NON_REENTRANT.  It was also
very fragile.

Restructure things so that:
 - We clear WRITE_PENDING when we set STANDBY.  This ensures we will
   requeue work when we wake up later.
 - con_work backs off if STANDBY is set.  There is nothing to do if we are
   in standby.
 - clear_standby() helper is called by both con_send() and con_keepalive(),
   the two actions that can wake us up again.  Move the connect_seq++
   logic here.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      e00de341
    • Sage Weil's avatar
      libceph: fix msgr keepalive flag · e76661d0
      Sage Weil authored 
      There was some broken keepalive code using a dead variable.  Shift to using
the proper bit flag.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      e76661d0
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