fsync() system call on ext3 causes blocked task messages
Issue
System panics with a process blocked in an fsync() system call on a ext3 filesystem.
INFO: task syslogd:3217 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syslogd D ffff810279c77510 0 3217 1 3220 3184 (NOTLB)
ffff810277547d98 0000000000000082 ffff810277547da8 ffffffff80063002
0000000000000000 0000000000000009 ffff810278edc040 ffff81027f54d7e0
000604cabfe9c44d 00000000000004d9 ffff810278edc228 00000001000004bb
Call Trace:
[<ffffffff80063002>] thread_return+0x62/0xfe
[<ffffffff88036e3d>] :jbd:log_wait_commit+0xa3/0xf5
[<ffffffff800a2fa2>] autoremove_wake_function+0x0/0x2e
[<ffffffff80099f07>] process_timeout+0x0/0x5
[<ffffffff8803179a>] :jbd:journal_stop+0x1d3/0x203
[<ffffffff8002fa73>] __writeback_single_inode+0x1dd/0x31c
[<ffffffff800e36bc>] do_readv_writev+0x26e/0x291
[<ffffffff800f678d>] sync_inode+0x24/0x33
[<ffffffff8804c382>] :ext3:ext3_sync_file+0xce/0xf8
[<ffffffff8004ff1d>] do_fsync+0x52/0xa4
[<ffffffff800e3f49>] __do_fsync+0x23/0x36
[<ffffffff8005d28d>] tracesys+0xd5/0xe0
Kernel panic - not syncing: hung_task: blocked tasks
Environment
- Red Hat Enterprise Linux 5.7
- ext3 filesystem
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