zeitgeist-datahub "Freezing of tasks failed after 20.005 seconds"

[Bryce Nesbitt]

My system no longer properly goes to sleep. The logs are filled with variants of:

[114631.282599] PM: Syncing filesystems ... done.
[114631.328752] PM: Preparing system for mem sleep
[114631.896631] Freezing user space processes ...
[114651.913199] Freezing of tasks failed after 20.005 seconds (1 tasks refusing to freeze, wq_busy=0):
[114651.913321] zeitgeist-datah D ffff88033fc33180 0 4659 4142 0x00000004
[114651.913325] ffff8802d6a05aa8 0000000000000086 ffff8802f3c4c800 ffff8802d6a05fd8
[114651.913328] 0000000000013180 0000000000013180 ffff8802f3c4c800 ffff88032a3bbe28
[114651.913330] ffff8800b0366000 ffff8802d6a05ad0 ffff88032a3bbf08 ffff88032a3bbe28
[114651.913333] Call Trace:
[114651.913340] [<ffffffff817280c9>] schedule+0x29/0x70
[114651.913345] [<ffffffff812add35>] __fuse_request_send+0x115/0x280
[114651.913350] [<ffffffff810ab390>] ? prepare_to_wait_event+0x100/0x100
[114651.913352] [<ffffffff812adeb2>] fuse_request_send+0x12/0x20
[114651.913355] [<ffffffff812b27f4>] fuse_dentry_revalidate+0x194/0x350
[114651.913360] [<ffffffff811c8fed>] lookup_fast+0x26d/0x2c0
[114651.913363] [<ffffffff811cabc3>] link_path_walk+0x1a3/0x880
[114651.913365] [<ffffffff810a543d>] ? enqueue_entity+0x2ad/0xbb0
[114651.913368] [<ffffffff811cb54b>] path_lookupat+0x5b/0x790
[114651.913372] [<ffffffff81098499>] ? ttwu_do_wakeup+0x19/0xc0
[114651.913376] [<ffffffff811a3425>] ? kmem_cache_alloc+0x35/0x1e0
[114651.913378] [<ffffffff811ce39f>] ? getname_flags+0x4f/0x190
[114651.913381] [<ffffffff811cbcab>] filename_lookup+0x2b/0xc0
[114651.913384] [<ffffffff811cf074>] user_path_at_empty+0x54/0x90
[114651.913388] [<ffffffff810f44d2>] ? from_kgid_munged+0x12/0x20
[114651.913390] [<ffffffff811c360d>] ? cp_new_stat+0x13d/0x160
[114651.913393] [<ffffffff811cf0c1>] user_path_at+0x11/0x20
[114651.913395] [<ffffffff811c31b0>] vfs_fstatat+0x50/0xa0
[114651.913397] [<ffffffff811c364f>] SYSC_newstat+0x1f/0x40
[114651.913400] [<ffffffff811c389e>] SyS_newstat+0xe/0x10
[114651.913403] [<ffffffff8173489d>] system_call_fastpath+0x1a/0x1f
[114651.913432]
[114651.913433] Restarting tasks ... done.

and the occasional

[46466.515860] INFO: task zeitgeist-datah:4659 blocked for more than 120 seconds.
[46466.515868] Tainted: P OX 3.13.0-63-generic #103-Ubuntu
[46466.515870] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[46466.515873] zeitgeist-datah D ffff88033fc33180 0 4659 4142 0x00000004
[46466.515880] ffff8802d6a05aa8 0000000000000086 ffff8802f3c4c800 ffff8802d6a05fd8
[46466.515886] 0000000000013180 0000000000013180 ffff8802f3c4c800 ffff88032a3bbe28
[46466.515890] ffff8800b0366000 ffff8802d6a05ad0 ffff88032a3bbf08 ffff88032a3bbe28
[46466.515895] Call Trace:
[46466.515906] [<ffffffff817280c9>] schedule+0x29/0x70
[46466.515913] [<ffffffff812add35>] __fuse_request_send+0x115/0x280
[46466.515922] [<ffffffff810ab390>] ? prepare_to_wait_event+0x100/0x100
[46466.515926] [<ffffffff812adeb2>] fuse_request_send+0x12/0x20
[46466.515932] [<ffffffff812b27f4>] fuse_dentry_revalidate+0x194/0x350
[46466.515939] [<ffffffff811c8fed>] lookup_fast+0x26d/0x2c0
[46466.515944] [<ffffffff811cabc3>] link_path_walk+0x1a3/0x880
[46466.515949] [<ffffffff810a543d>] ? enqueue_entity+0x2ad/0xbb0
[46466.515954] [<ffffffff811cb54b>] path_lookupat+0x5b/0x790
[46466.515960] [<ffffffff81098499>] ? ttwu_do_wakeup+0x19/0xc0
[46466.515966] [<ffffffff811a3425>] ? kmem_cache_alloc+0x35/0x1e0
[46466.515971] [<ffffffff811ce39f>] ? getname_flags+0x4f/0x190
[46466.515976] [<ffffffff811cbcab>] filename_lookup+0x2b/0xc0
[46466.515981] [<ffffffff811cf074>] user_path_at_empty+0x54/0x90
[46466.515988] [<ffffffff810f44d2>] ? from_kgid_munged+0x12/0x20
[46466.515992] [<ffffffff811c360d>] ? cp_new_stat+0x13d/0x160
[46466.515997] [<ffffffff811cf0c1>] user_path_at+0x11/0x20
[46466.516001] [<ffffffff811c31b0>] vfs_fstatat+0x50/0xa0
[46466.516005] [<ffffffff811c364f>] SYSC_newstat+0x1f/0x40
[46466.516010] [<ffffffff811c389e>] SyS_newstat+0xe/0x10
[46466.516015] [<ffffffff8173489d>] system_call_fastpath+0x1a/0x1f

6831104 Oct 6 16:57 activity.sqlite
3271680 Sep 17 2014 activity.sqlite.bck
163840 Oct 7 17:15 activity.sqlite-shm
288943064 Oct 7 17:15 activity.sqlite-wal
322 Nov 10 2013 datasources.pickle
4096 Oct 7 14:03 fts.index

Going to settings and selecting "Clear usage data" and "All time" resulted in no change of file sizes
and no improvement to suspend. Turning "record file and usage" to "off" left the zeitgeist-datahub running.

A "kill -9" of the datahub process results in no change (the task does not die)

# ps -F 4659
UID PID PPID C SZ RSS PSR STIME TTY STAT TIME CMD
xxxxxx 4659 4142 0 105023 11872 1 Oct06 ? D 0:33 zeitgeist-datahub

See also
http://linuxaria.com/howto/how-to-remove-zeitgeist-in-ubuntu-and-why

[Bryce Nesbitt (bryce2)]

See also https://bugs.launchpad.net/ubuntu/+source/zeitgeist-datahub/+bug/792229

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.