Long delays during journal transaction commit can cause blocked task warnings
Issue
System reports blocked tasks waiting for journal space:
INFO: task oracle:13070 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
oracle D ffffffff80157c4c 0 13070 12969 15092 13071 13069 (NOTLB)
ffff8124e95fde88 0000000000000082 0000000000000000 ffffffff883c7f5b
ffff8124e95fded8 0000000000000007 ffff8124ed7517a0 ffff8120f07447e0
000077d22b830203 000000000000087d ffff8124ed751988 0000001800000246
Call Trace:
[<ffffffff883c7f5b>] :ext4:__ext4_journal_stop+0x66/0x73
[<ffffffff883a36e4>] :jbd2:jbd2_log_wait_commit+0xa3/0xf5
[<ffffffff800a3bc2>] autoremove_wake_function+0x0/0x2e
[<ffffffff883a3762>] :jbd2:__jbd2_log_start_commit+0x2c/0x34
[<ffffffff883b8fbe>] :ext4:ext4_sync_file+0x166/0x1a8
[<ffffffff800504a6>] do_fsync+0x52/0xa4
[<ffffffff800e5326>] __do_fsync+0x23/0x36
[<ffffffff8005d29e>] tracesys+0xd5/0xdf
Environment
- Red Hat Enterprise Linux 5.9
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