Description of problem: I recently upgraded to FC 15 and discovered that I could no longer hibernate my PC (it worked fine in FC12); it invariably ends up saying: ~~~ Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze, wq_busy=0): ~~~ The task which won't sleep is umount; from the messages file: ~~~ Sep 6 21:51:58 mozart kernel: [ 4454.412161] umount D ffff880037dd7100 0 2551 2531 0x00800084 Sep 6 21:51:58 mozart kernel: [ 4454.412166] ffff880067375b78 0000000000000082 ffff8800376df328 ffff880000000001 Sep 6 21:51:58 mozart kernel: [ 4454.412169] ffff88006abc1730 ffff880067375fd8 ffff880067375fd8 00000000000126c0 Sep 6 21:51:58 mozart kernel: [ 4454.412173] ffff8800a9aa9730 ffff88006abc1730 ffff880067375b48 00000001814b704c Sep 6 21:51:58 mozart kernel: [ 4454.412176] Call Trace: Sep 6 21:51:58 mozart kernel: [ 4454.412201] [<ffffffffa031a847>] ? rpc_queue_empty+0x2e/0x2e [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412211] [<ffffffffa031a87b>] rpc_wait_bit_killable+0x34/0x38 [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412217] [<ffffffff814b6011>] __wait_on_bit+0x48/0x7b Sep 6 21:51:58 mozart kernel: [ 4454.412221] [<ffffffff8105a6e4>] ? _local_bh_enable_ip+0x25/0x8e Sep 6 21:51:58 mozart kernel: [ 4454.412224] [<ffffffff814b60b6>] out_of_line_wait_on_bit+0x72/0x7d Sep 6 21:51:58 mozart kernel: [ 4454.412233] [<ffffffffa031a847>] ? rpc_queue_empty+0x2e/0x2e [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412236] [<ffffffff81070437>] ? autoremove_wake_function+0x3d/0x3d Sep 6 21:51:58 mozart kernel: [ 4454.412245] [<ffffffffa031b41c>] __rpc_execute+0xf0/0x293 [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412254] [<ffffffffa031b62c>] rpc_execute+0x3f/0x43 [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412261] [<ffffffffa0314e0f>] rpc_run_task+0x86/0x8e [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412268] [<ffffffffa0314f04>] rpc_call_sync+0x45/0x66 [sunrpc] Sep 6 21:51:58 mozart kernel: [ 4454.412300] [<ffffffffa036d432>] nfs3_rpc_wrapper.constprop.7+0x2c/0x64 [nfs] Sep 6 21:51:58 mozart kernel: [ 4454.412313] [<ffffffffa036e504>] nfs3_proc_getattr+0x5d/0x83 [nfs] Sep 6 21:51:58 mozart kernel: [ 4454.412324] [<ffffffffa036000d>] __nfs_revalidate_inode+0xb4/0x1a2 [nfs] Sep 6 21:51:58 mozart kernel: [ 4454.412334] [<ffffffffa036024b>] nfs_revalidate_inode+0x4a/0x51 [nfs] Sep 6 21:51:58 mozart kernel: [ 4454.412344] [<ffffffffa036032a>] nfs_getattr+0x92/0xc4 [nfs] Sep 6 21:51:58 mozart kernel: [ 4454.412348] [<ffffffff8112a5f7>] vfs_getattr+0x45/0x63 Sep 6 21:51:58 mozart kernel: [ 4454.412351] [<ffffffff8112a66d>] vfs_fstatat+0x58/0x6e Sep 6 21:51:58 mozart kernel: [ 4454.412355] [<ffffffff810542a2>] ? do_fork+0x1e5/0x2c8 Sep 6 21:51:58 mozart kernel: [ 4454.412358] [<ffffffff8112a6be>] vfs_stat+0x1b/0x1d Sep 6 21:51:58 mozart kernel: [ 4454.412360] [<ffffffff8112a7bd>] sys_newstat+0x1a/0x33 Sep 6 21:51:58 mozart kernel: [ 4454.412363] [<ffffffff8112f5e8>] ? path_put+0x20/0x24 Sep 6 21:51:58 mozart kernel: [ 4454.412366] [<ffffffff810a0c7c>] ? audit_syscall_entry+0x145/0x171 Sep 6 21:51:58 mozart kernel: [ 4454.412370] [<ffffffff814bd7c2>] system_call_fastpath+0x16/0x1b Sep 6 21:51:58 mozart kernel: [ 4454.412373] ~~~ A little debugging indicated that pm-hibernate is (via /usr/lib64/pm-utils/sleep.d/55NetworkManager) telling NetworkManager that the system is going to hibernate. NetworkManager then appears to first take down the interface and then call /etc/NetworkManager/dispatcher.d/05-netfs to umount the network file systems. Of course since the interface is already down this takes a bit longer than expected. Modifying 05-netfs so that it no longer bothers doing "netfs stop" fixes the problem and my PC can again hibernate. Version-Release number of selected component (if applicable): NetworkManager-0.8.9997-6.git20110721.fc15.x86_64 initscripts-9.30-2.fc15.x86_64 (the 05-netfs script comes from this package) How reproducible: 100% Steps to Reproduce: 1. Mount an NFS filesystem (my fstab just says to use "defaults" which comes out to vers=3,proto=tcp,timeo=600 when mounting things from my NAS) 2. Attempt to hibernate (suspend should be the same) 3. Actual results: PC does not hibernate but instead complains about tasks refusing to sleep Expected results: PC hibernates (Upon resume NFS mounts are mounted again) Additional info: Not entirely sure if this should be a NetworkManager bug or an initscripts bug. A toss of the dice yields initscripts.
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