I was experimenting to see how many new tests the updated xfstests enabled and when trying it over nfs ran into a strange problem with 3.18-rc3 on nfs v3 mount after the usual generic/035 (nlink count is 1 when should be zero) test failure with v3 xfstest generic/036 hung with the following [22918.651195] INFO: task aio-dio-fcntl-r:63057 blocked for more than 120 seconds. [22918.651197] Not tainted 3.18.0-031800rc3-generic #201411022335 [22918.651198] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [22918.651199] aio-dio-fcntl-r D 0000000000000000 0 63057 63056 0x00000000 [22918.651202] ffff880111c8bd08 0000000000000046 ffff88009d099648 ffffea0002742600 [22918.651205] ffff880111c8bfd8 0000000000014640 ffff88009165bf00 0000000000014640 [22918.651207] ffffffff81c1d4e0 ffff8800ba110a00 ffff880111c8bcf8 ffff8800808f7c50 [22918.651209] Call Trace: [22918.651213] [<ffffffff817a4dd9>] schedule+0x29/0x70 [22918.651216] [<ffffffff817a50fe>] schedule_preempt_disabled+0xe/0x10 [22918.651219] [<ffffffff817a6db5>] __mutex_lock_slowpath+0x95/0x100 [22918.651222] [<ffffffff817a6e43>] mutex_lock+0x23/0x37 [22918.651239] [<ffffffffc08b086b>] nfs4_file_fsync+0x6b/0xa0 [nfsv4] [22918.651243] [<ffffffff81216089>] vfs_fsync+0x29/0x40 [22918.651250] [<ffffffffc07e8cea>] nfs_file_flush+0x8a/0xd0 [nfs] [22918.651255] [<ffffffff811e378a>] filp_close+0x3a/0x90 [22918.651261] [<ffffffff8120303a>] put_files_struct.part.12+0x7a/0xd0 [22918.651264] [<ffffffff812033e5>] put_files_struct+0x15/0x20 [22918.651266] [<ffffffff812034b2>] exit_files+0x52/0x60 [22918.651269] [<ffffffff81071811>] do_exit+0x171/0x470 [22918.651272] [<ffffffff81071ba4>] do_group_exit+0x44/0xa0 [22918.651274] [<ffffffff81071c17>] SyS_exit_group+0x17/0x20 [22918.651276] [<ffffffff817a8fed>] system_call_fastpath+0x16/0x1b Is this something recently fixed (or regressed)? I don't see much in the changelog in the last two weeks in fs/nfs that looks plausibly related. Tomorrow I will update to current (rc4) mainline and see if it goes away - but curious if others had seen this ... (e.g. with test 036) -- Thanks, Steve -- 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
