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IDProjectCategoryView StatusLast Update
0014320CentOS-7kernelpublic2018-01-03 02:39
Reporterdclowes 
PrioritynormalSeveritymajorReproducibilitysometimes
Status newResolutionopen 
PlatformX86_64OSCentOSOS Version7.4
Product Version7.4.1708 
Target VersionFixed in Version 
Summary0014320: task blocked in nfs/xfs/lvm stack after 7.4 upgrade
DescriptionMythTV backend client experiences NFS timeouts due to NFS server task hang. First occurred after CentOS 7.3->7.4 upgrade (kernel 693.2.2). Booting older kernel (514.26.2) removed issue. Later upgrade to 693.11.1 returned same issue. Booting same older kernel (514.26.2) removed issue.
Steps To ReproduceBoot 693 kernel and wait.
Additional InformationThis is a home network with MythTV in a Fedora 25 VM on a CentOS 7 host with storage directories mounted from the host over NFSv3.

Jan 3 05:45:16 eagle kernel: INFO: task nfsd:2512 blocked for more than 120 seconds.
Jan 3 05:45:16 eagle kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jan 3 05:45:16 eagle kernel: nfsd D ffffffff816a76c0 0 2512 2 0x00000080
Jan 3 05:45:16 eagle kernel: ffff8800b50ef970 0000000000000046 ffff88080ffa8fd0 ffff8800b50effd8
Jan 3 05:45:16 eagle kernel: ffff8800b50effd8 ffff8800b50effd8 ffff88080ffa8fd0 ffff88083f356cc0
Jan 3 05:45:16 eagle kernel: 0000000000000000 7fffffffffffffff ffff88083f5a04e8 ffffffff816a76c0
Jan 3 05:45:16 eagle kernel: Call Trace:
Jan 3 05:45:16 eagle kernel: [<ffffffff816a76c0>] ? bit_wait+0x50/0x50
Jan 3 05:45:16 eagle kernel: [<ffffffff816a9599>] schedule+0x29/0x70
Jan 3 05:45:16 eagle kernel: [<ffffffff816a70a9>] schedule_timeout+0x239/0x2c0
Jan 3 05:45:16 eagle kernel: [<ffffffffc00028a9>] ? __split_and_process_bio+0x2e9/0x520 [dm_mod]
Jan 3 05:45:16 eagle kernel: [<ffffffff816a76c0>] ? bit_wait+0x50/0x50
Jan 3 05:45:16 eagle kernel: [<ffffffff816a8c1d>] io_schedule_timeout+0xad/0x130
Jan 3 05:45:16 eagle kernel: [<ffffffff816a8cb8>] io_schedule+0x18/0x20
Jan 3 05:45:16 eagle kernel: [<ffffffff816a76d1>] bit_wait_io+0x11/0x50
Jan 3 05:45:16 eagle kernel: [<ffffffff816a71f5>] __wait_on_bit+0x65/0x90
Jan 3 05:45:16 eagle kernel: [<ffffffff81181cc1>] wait_on_page_bit+0x81/0xa0
Jan 3 05:45:16 eagle kernel: [<ffffffff810b19e0>] ? wake_bit_function+0x40/0x40
Jan 3 05:45:16 eagle kernel: [<ffffffff81181df1>] __filemap_fdatawait_range+0x111/0x190
Jan 3 05:45:16 eagle kernel: [<ffffffff81181e84>] filemap_fdatawait_range+0x14/0x30
Jan 3 05:45:16 eagle kernel: [<ffffffff81183dc6>] filemap_write_and_wait_range+0x56/0x90
Jan 3 05:45:16 eagle kernel: [<ffffffffc04a8b36>] xfs_file_fsync+0x66/0x1e0 [xfs]
Jan 3 05:45:16 eagle kernel: [<ffffffff8123320d>] vfs_fsync_range+0x1d/0x30
Jan 3 05:45:16 eagle kernel: [<ffffffffc05a6d55>] nfsd_vfs_write+0x1c5/0x3a0 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffffc05a952b>] nfsd_write+0x10b/0x290 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffffc05afc20>] nfsd3_proc_write+0xc0/0x160 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffffc05a1593>] nfsd_dispatch+0xd3/0x280 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffffc055d463>] svc_process_common+0x453/0x6f0 [sunrpc]
Jan 3 05:45:16 eagle kernel: [<ffffffffc055d803>] svc_process+0x103/0x190 [sunrpc]
Jan 3 05:45:16 eagle kernel: [<ffffffffc05a0eff>] nfsd+0xdf/0x150 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffffc05a0e20>] ? nfsd_destroy+0x80/0x80 [nfsd]
Jan 3 05:45:16 eagle kernel: [<ffffffff810b099f>] kthread+0xcf/0xe0
Jan 3 05:45:16 eagle kernel: [<ffffffff810b08d0>] ? insert_kthread_work+0x40/0x40
Jan 3 05:45:16 eagle kernel: [<ffffffff816b4fd8>] ret_from_fork+0x58/0x90
Jan 3 05:45:16 eagle kernel: [<ffffffff810b08d0>] ? insert_kthread_work+0x40/0x40
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Date Modified Username Field Change
2018-01-03 02:39 dclowes New Issue