This series seem to cause hangs during xfstests against a server on the same VM. The trace is fairly similar every the hang happens, but the point at which it happens differs: [ 3120.186527] INFO: task fill:26222 blocked for more than 120 seconds. [ 3120.187607] Not tainted 3.15.0-rc1+ #22 [ 3120.188424] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 3120.189765] fill D ffff88007a5b3c20 0 26222 26130 0x00000002 [ 3120.191158] ffff88007a5b3b78 0000000000000046 ffff880079284f10 0000000000013dc0 [ 3120.192666] ffff88007a5b3fd8 0000000000013dc0 ffff88007350cf10 ffff880079284f10 [ 3120.195303] 0000000000000000 0000000000000002 0000000000000001 0000000000000000 [ 3120.197980] Call Trace: [ 3120.198849] [<ffffffff8112ff2d>] ? __delayacct_blkio_start+0x1d/0x20 [ 3120.200791] [<ffffffff810ead35>] ? prepare_to_wait+0x25/0x90 [ 3120.202438] [<ffffffff811114f5>] ? ktime_get_ts+0x145/0x180 [ 3120.204033] [<ffffffff8115ef50>] ? __lock_page+0x70/0x70 [ 3120.205598] [<ffffffff8107c83f>] ? kvm_clock_read+0x1f/0x30 [ 3120.207236] [<ffffffff8107c859>] ? kvm_clock_get_cycles+0x9/0x10 [ 3120.209006] [<ffffffff81111464>] ? ktime_get_ts+0xb4/0x180 [ 3120.210828] [<ffffffff8112ff2d>] ? __delayacct_blkio_start+0x1d/0x20 [ 3120.212645] [<ffffffff8115ef50>] ? __lock_page+0x70/0x70 [ 3120.214290] [<ffffffff81ce5294>] schedule+0x24/0x70 [ 3120.216915] [<ffffffff81ce536a>] io_schedule+0x8a/0xd0 [ 3120.218484] [<ffffffff8115ef59>] sleep_on_page+0x9/0x10 [ 3120.219979] [<ffffffff81ce5a8a>] __wait_on_bit+0x5a/0x90 [ 3120.221543] [<ffffffff8115e9cf>] ? find_get_pages_tag+0x1f/0x190 [ 3120.223310] [<ffffffff8115f438>] wait_on_page_bit+0x78/0x80 [ 3120.224934] [<ffffffff810eb240>] ? wake_atomic_t_function+0x30/0x30 [ 3120.226755] [<ffffffff8115f5a2>] filemap_fdatawait_range+0x102/0x190 [ 3120.228615] [<ffffffff8116033a>] filemap_write_and_wait_range+0x4a/0x80 [ 3120.230640] [<ffffffff8135c00f>] nfs4_file_fsync+0x5f/0xb0 [ 3120.232230] [<ffffffff811d70c1>] vfs_fsync+0x21/0x30 [ 3120.233716] [<ffffffff8132a1fe>] nfs_file_flush+0x6e/0x90 [ 3120.235261] [<ffffffff811a4ac5>] filp_close+0x35/0x80 [ 3120.236758] [<ffffffff811c4844>] put_files_struct+0x94/0xe0 [ 3120.238361] [<ffffffff811c494d>] exit_files+0x4d/0x60 [ 3120.239863] [<ffffffff810ad947>] do_exit+0x297/0xa00 [ 3120.241336] [<ffffffff811a91b8>] ? __sb_end_write+0x78/0x80 [ 3120.242925] [<ffffffff81cea158>] ? retint_swapgs+0x13/0x1b [ 3120.244541] [<ffffffff810ae1d7>] do_group_exit+0x47/0xc0 [ 3120.246129] [<ffffffff810ae262>] SyS_exit_group+0x12/0x20 [ 3120.247960] [<ffffffff81cf24f9>] system_call_fastpath+0x16/0x1b [ 3120.249226] no locks held by fill/26222. -- 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
