This bug was fixed in the package systemd - 223-1ubuntu1
---------------
systemd (223-1ubuntu1) wily; urgency=medium
* Merge with Debian unstable. Remaining Ubuntu changes:
- Hack to support system-image read-only /etc, and modify files in
/etc/writable/ instead.
- Keep our much simpler udev maintainer scripts (all platforms must
support udev, no debconf).
- initramfs init-bottom: If LVM is installed, settle udev,
otherwise we get missing LV symlinks. Workaround for LP #1185394.
- Add debian/udev.lvm2.init: Dummy SysV init script to satisfy insserv
dependencies to "lvm2" which is handled with udev rules in Ubuntu.
- Add debian/udev.lvm2.service to avoid running the dummy lvm2 init
script.
- Provide shutdown fallback for upstart. (LP: #1370329)
- debian/extra/ifup@.service: Additionally run for "auto" class. We don't
really support "allow-hotplug" in Ubuntu at the moment, so we need to
deal with "auto" devices appearing after "/etc/init.d/networking start"
already ran. (LP: #1374521)
- ifup@.service: Drop dependency on networking.service (i. e.
/etc/init.d/networking), and merely ensure that /run/network exists.
This avoids unnecessary dependencies/waiting during boot and dependency
cycles if hooks wait for other interfaces to come up (like ifenslave
with bonding interfaces). (LP: #1414544)
- Add Get-RTC-is-in-local-time-setting-from-etc-default-rc.patch: In
Ubuntu we currently keep the setting whether the RTC is in local or UTC
time in /etc/default/rcS "UTC=yes|no", instead of /etc/adjtime.
(LP: #1377258)
- Put session scopes into all cgroup controllers. This makes unprivileged
user LXC containers work under systemd. (LP: #1346734)
- systemctl: Don't forward telinit u to upstart. This works around
upstart's Restart() always reexec'ing /sbin/init on Restart(), even if
that changes to point to systemd during the upgrade. This avoids running
systemd during a dist-upgrade. (LP: #1430479)
- Drop hwdb-update dependency from udev-trigger.service, which got
introduced in v219-stable. This causes udev and plymouth to start too
late and isn't really needed in Ubuntu yet as we don't support stateless
systems yet and handle hwdb.bin updates through dpkg triggers. This can
be dropped again with initramfs-tools 0.117.
- Lower Breaks: to plymouth version which has the udev inotify fix in
Ubuntu.
- Lower apparmor Breaks: to the Ubuntu version that dropped $remote_fs.
- Change systemd-sysv's conflicts to upstart-sysv. (LP: #1422681)
Upgrade fixes, keep until 16.04 LTS release:
- systemd Conflicts/Replaces/Provides systemd-services.
- Remove obsolete systemd-logind upstart job.
- Clean up obsolete /etc/udev/rules.d/README.
- systemd.postinst: Migrate mountall specific fstab options to standard
util-linux "nofail" option.
systemd (223-3) UNRELEASED; urgency=medium
* boot-and-services autopkgtest: Ignore thermald. Since 1.4.3-2 it starts by
default, but fails in most virtual envs.
systemd (223-2) unstable; urgency=medium
* Don't enable gnu-efi on ARM. It FTBFSes and cannot really be tested now as
there is no available hardware.
* debian/extra/initramfs-tools/hooks/udev: Don't fail if
/etc/systemd/network/ does not exist. (Closes: #794050)
systemd (223-1) unstable; urgency=medium
* New upstream release:
- Fix systemd-bootchart crash. (Closes: #792403)
- Trim list of files in /usr/share/doc/systemd/. (Closes: #791839)
- Fix "Invalid argument" failure with some journal files.
(Closes: #792090)
- tmpfiles: Don't recursively descend into journal directories in /var.
(Closes: #791897)
- Don't frequently wake up on disabled TimeoutIdleSec=, in particular in
automount timers. (LP: #1470845)
- tmpfiles: Don't delete lost+found/. (Closes: #788193)
[ Michael Biebl ]
* udev: Remove obsolete rm_conffile/mv_conffile functions from udev.preinst.
The udev package is using dpkg-maintscripts-helper now to remove obsolete
conffiles.
* systemd: Remove obsolete conffile clean up from pre-wheezy.
* udev-udeb: Remove scsi_wait_scan hack from the start-udev script as well.
[ Martin Pitt ]
* Enable GNU EFI support and add gnu-efi build dep. This enables/ships the
systemd EFI boot loader. (Closes: #787720, LP: #1472283)
* networkd autopkgtest: More robust/forceful killing of dnsmasq.
* ifup@.service: Drop "oneshot" to run ifup in the background during boot.
This avoids blocking network.target on boot with unavailable hotplug
interfaces in /etc/network/interfaces. (Closes: #790669, LP: #1425376)
* systemd.postinst: Avoid confusing error message about
/run/systemd/was-enabled not existing on reconfiguring.
* debian/extra/initramfs-tools/hooks/udev: Drop some redundant code.
* Fix networkd-wait-online -i to properly wait for the given interfaces
only.
* Drop debian/extra/base-installer.d/05udev: We use net.ifnames by default
now, thus we don't need to copy 70-persistent-*.rules any more.
* debian/extra/start-udev: Run d-i's udevd with "notice" log level, just
like we did in the initramfs in 219-10.
* Fix size explosion of networkd (post-223 patch from trunk).
[ Julian Wollrath ]
* Copy all .link interface naming definitions to initramfs. (Closes: #793374)
[ Felipe Sateler ]
* nss-my*.postinst: configure at the end of the hosts line, not before
files. (Closes: #789006)
-- Martin Pitt <martin.p...@ubuntu.com> Fri, 31 Jul 2015 07:38:04
+0200
** Changed in: systemd (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1470845
Title:
wakes up from automount-expire timer every second
Status in systemd package in Ubuntu:
Fix Released
Bug description:
I noticed that systemd on my idle Wily desktop is creating very short
lived threads at 1Hz. While these aren't doing much, it still
consumes power doing wakeups to create these periodic threads.
Showing thread creation with forkstat:
$ sudo forkstat
Time Event PID Info Duration Process
13:43:07 clone 1 parent /sbin/init splash
13:43:07 clone 7483 thread /sbin/init splash
13:43:07 exit 7483 0 0.001 /sbin/init splash
13:43:08 clone 1 parent /sbin/init splash
13:43:08 clone 7484 thread /sbin/init splash
13:43:08 exit 7484 0 0.000 /sbin/init splash
13:43:10 clone 1 parent /sbin/init splash
13:43:10 clone 7485 thread /sbin/init splash
13:43:10 exit 7485 0 0.000 /sbin/init splash
13:43:11 clone 1 parent /sbin/init splash
13:43:11 clone 7486 thread /sbin/init splash
13:43:11 exit 7486 0 0.000 /sbin/init splash
13:43:12 clone 1 parent /sbin/init splash
13:43:12 clone 7487 thread /sbin/init splash
13:43:12 exit 7487 0 0.000 /sbin/init splash
13:43:13 clone 1 parent /sbin/init splash
13:43:13 clone 7488 thread /sbin/init splash
13:43:13 exit 7488 0 0.000 /sbin/init splash
13:43:15 clone 1 parent /sbin/init splash
13:43:15 clone 7489 thread /sbin/init splash
13:43:15 exit 7489 0 0.000 /sbin/init splash
13:43:16 clone 1 parent /sbin/init splash
13:43:16 clone 7490 thread /sbin/init splash
13:43:16 exit 7490 0 0.000 /sbin/init splash
13:43:17 clone 1 parent /sbin/init splash
13:43:17 clone 7491 thread /sbin/init splash
13:43:17 exit 7491 0 0.000 /sbin/init splash
And it's consuming some cycles over time:
$ sudo perf stat -p 1
^C
Performance counter stats for process id '1':
7.519868 task-clock (msec) # 0.000 CPUs utilized
41 context-switches # 0.005 M/sec
39 cpu-migrations # 0.005 M/sec
3 page-faults # 0.399 K/sec
12,107,977 cycles # 1.610 GHz
10,597,101 stalled-cycles-frontend # 87.52% frontend cycles
idle
0 stalled-cycles-backend # 0.00% backend cycles
idle
2,285,818 instructions # 0.19 insns per cycle
# 4.64 stalled cycles
per insn
457,133 branches # 60.790 M/sec
69,444 branch-misses # 15.19% of all branches
46.099593011 seconds time elapsed
The thread is just doing the following:
clock_gettime(0x7 /* CLOCK_??? */, {52592, 947682919}) = 0
read(14, "\1\0\0\0\0\0\0\0", 8) = 8
fcntl(30, F_DUPFD_CLOEXEC, 3) = 15
ioctl(30, 0xc0189374, 0x7ffeaf311470) = 0
fcntl(16, F_GETFD) = 0x1 (flags FD_CLOEXEC)
clone(Process 7466 attached
child_stack=0x7f97c3580e30,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
parent_tidptr=0x7f97c35819d0, tls=0x7f97c3581700, child_tidptr=0x7f97c35819d0)
= 7466
[pid 7466] set_robust_list(0x7f97c35819e0, 24) = 0
[pid 1] timerfd_settime(14, TFD_TIMER_ABSTIME, {it_interval={0, 0},
it_value={52594, 197493000}}, NULL <unfinished ...>
[pid 7466] ioctl(15, 0xc018937c <unfinished ...>
[pid 1] <... timerfd_settime resumed> ) = 0
[pid 7466] <... ioctl resumed> , 0x7f97c3580d60) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 1] epoll_wait(4, <unfinished ...>
[pid 7466] close(15) = 0
[pid 7466] close(16) = 0
[pid 7466] madvise(0x7f97c2d81000, 8368128, MADV_DONTNEED) = 0
[pid 7466] _exit(0) = ?
[pid 7466] +++ exited with 0 +++
<... epoll_wait resumed> {{EPOLLIN, {u32=3, u64=3}}}, 34, -1) = 1
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