Since 3.18.9 suspend no longer works reliably (only ~10% of the time), unlike 3.18.8; the suspend sequence starts, but after a few seconds the machine just returns to wakeup state. The following log spew points the finger at NFS-related changes: Mar 11 00:54:45 ragnarok kernel: PM: Syncing filesystems ... done. Mar 11 00:55:05 ragnarok kernel: Freezing user space processes ... (elapsed 0.001 seconds) done. Mar 11 00:55:05 ragnarok kernel: Freezing remaining freezable tasks ... Mar 11 00:55:05 ragnarok kernel: nfsv4.1-svc D ffff88061f411740 0 22942 2 0x00000000 Mar 11 00:55:05 ragnarok kernel: ffff8800d63cfd98 0000000000000046 ffff8800d63cfc78 0000000000009000 Mar 11 00:55:05 ragnarok kernel: ffff88059b582ca0 ffff8800d63cffd8 ffff88059b583020 01ffffffa07c0798 Mar 11 00:55:05 ragnarok kernel: 0000000000011740 ffffffff81816500 ffff88061f411740 ffff88055cc48ee0 Mar 11 00:55:05 ragnarok kernel: Call Trace: Mar 11 00:55:05 ragnarok kernel: [<ffffffffa07c57e4>] ? rpc_release_resources_task+0x34/0x40 [sunrpc] Mar 11 00:55:05 ragnarok kernel: [<ffffffffa07c64de>] ? __rpc_execute+0x18e/0x360 [sunrpc] Mar 11 00:55:05 ragnarok kernel: [<ffffffff8108ad4b>] ? lock_timer_base.isra.36+0x2b/0x50 Mar 11 00:55:05 ragnarok kernel: [<ffffffff8108ae1f>] ? try_to_del_timer_sync+0x4f/0x70 Mar 11 00:55:05 ragnarok kernel: [<ffffffff81535c02>] schedule_timeout+0x102/0x1f0 Mar 11 00:55:05 ragnarok kernel: [<ffffffffa07c67b0>] ? rpc_do_put_task+0x80/0x90 [sunrpc] Mar 11 00:55:05 ragnarok kernel: [<ffffffff8108a7b0>] ? migrate_timer_list+0xb0/0xb0 Mar 11 00:55:05 ragnarok kernel: [<ffffffffa03c1f7a>] nfs41_callback_svc+0x16a/0x180 [nfsv4] Mar 11 00:55:05 ragnarok kernel: [<ffffffff81074710>] ? __wake_up_sync+0x20/0x20 Mar 11 00:55:05 ragnarok kernel: [<ffffffffa03c1e10>] ? nfs4_callback_svc+0x60/0x60 [nfsv4] Mar 11 00:55:05 ragnarok kernel: [<ffffffff81067c2b>] kthread+0xdb/0x100 Mar 11 00:55:05 ragnarok kernel: [<ffffffff81067b50>] ? kthread_create_on_node+0x180/0x180 Mar 11 00:55:05 ragnarok kernel: [<ffffffff81536d2c>] ret_from_fork+0x7c/0xb0 Mar 11 00:55:05 ragnarok kernel: [<ffffffff81067b50>] ? kthread_create_on_node+0x180/0x180 Mar 11 00:55:05 ragnarok kernel: Mar 11 00:55:05 ragnarok kernel: Restarting kernel threads ... done. Mar 11 00:55:05 ragnarok kernel: Restarting tasks ... done. I found that shutting down the automount service (thus killing all NFS mounts) makes things work immediately. The same symptom can be seen in 3.19.1, which - as far as I can tell - got the same commits recently. Any ideas? I can gladly test patches. Thanks! Holger -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
