Comment 20 for bug 763986

Next kind of. Again slightly different. on 3.0.0-t43-prod-03124-g81d6743-dirty

[188056.511692] PM: Syncing filesystems ... done.
[188057.344873] Freezing user space processes ...
[188077.360091] Freezing of tasks failed after 20.01 seconds (2 tasks refusing to freeze, wq_busy=0):
[188077.360819] collectd D f524f900 0 3453 3443 0x00800004
[188077.361356] f37c1e88 00000082 c1027ef6 f524f900 00000092 00000000 f37c1e38 00000092
[188077.362089] 00000000 f56ccfa0 f37c1e38 f37c1e60 c1026e67 00000000 00000001 00000003
[188077.362821] f56ccfa0 f37c1e78 c10380be f56ccfa0 c1038a6f 00000000 00000000 f56ccfa0
[188077.363553] Call Trace:
[188077.363763] [<c1027ef6>] ? check_preempt_curr+0x76/0x90
[188077.364188] [<c1026e67>] ? __wake_up_common+0x47/0x70
[188077.364601] [<c10380be>] ? recalc_sigpending+0xe/0x30
[188077.365013] [<c1038a6f>] ? __set_task_blocked+0x2f/0x80
[188077.365438] [<c103a5ad>] ? set_current_blocked+0xd/0x10
[188077.365863] [<c103a60b>] ? sigprocmask+0x5b/0xd0
[188077.366243] [<c11a7a7d>] ? fuse_request_send+0xbd/0x250
[188077.366669] [<c1043b80>] ? finish_wait+0x50/0x50
[188077.367047] [<c11b0a7c>] ? fuse_statfs+0xdc/0x160
[188077.367434] [<c10cc6d5>] ? statfs_by_dentry+0xb5/0x110
[188077.367853] [<c10cc74a>] ? vfs_statfs+0x1a/0xa0
[188077.368223] [<c10cc808>] ? user_statfs+0x38/0x60
[188077.368601] [<c10cc8ca>] ? sys_statfs64+0x1a/0x40
[188077.368987] [<c15838d0>] ? sysenter_do_call+0x12/0x26

and on more call trace (as two tasks was freezed), probably releated to bug #34572 (see comment #15 there).