http://bugzilla.kernel.org/show_bug.cgi?id=12815 Summary: JBD: barrier-based sync failed on dm-1:8 - disabling barriers -- and then hang Product: File System Version: 2.5 KernelVersion: 2.6.28 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 AssignedTo: fs_ext4@xxxxxxxxxxxxxxxxxxxx ReportedBy: joey@xxxxxxxxxxx Latest working kernel version: none Earliest failing kernel version: 2.6.28.1 Distribution: Debian unstable Hardware Environment: Thecus N2100 (arm), two 1 TB SATA drives Software Environment: /home is an ext4 filesystem on an LVM of the two drives Problem Description: This has happened at least three times since I converted the filesystem from ext3 to ext4 two days ago. All processes accessing the filesystem go into uninterruptable sleep. The system does not crash. On one occasion, the problem cleared itself up after a few minutes and processes resumed running. On the other two, I hard-reset the machine after 8 hours, and half an hour, respectively. The only thing in the log is this: JBD: barrier-based sync failed on dm-1:8 - disabling barriers It was never logged in the month before switching to ext4, and has been logged seven times in the past two days. I have not matched up all seven times exactly with the hangs, but some of them match up very well. Steps to reproduce: Unsure, but heavy disk load does not seem to help; at one point rtorrent was hashing a large file when the hang occurred. This may be a duplicate of bug 12679 -- at least, the symtoms as described are the same, and the backtrace obtained there shows a hang in jbd2_journal_commit_transaction, which calls the function from which my message originates. I am running a Debian kernel, not mainline. Apologies, but I don't have a head on this machine. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
