https://bugzilla.kernel.org/show_bug.cgi?id=16278 Summary: lvm snapshot causes deadlock in 2.6.35 Product: File System Version: 2.5 Kernel Version: 2.6.35-rc[123] Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 AssignedTo: fs_ext4@xxxxxxxxxxxxxxxxxxxx ReportedBy: psusi@xxxxxxxxxx Regression: Yes Copying from: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/595489 Attempting to snapshot the root lv causes a deadlock in 2.6.35 when it suspends the root lv device to replace the table. The lvcreate -n snap -s -L 1g lv/root command hangs, can not be killed, and no further IO is possible, and the system must be hard booted with magic-sysrq. Narrowed down cause to commit 6b0310fbf087ad6: "ext4: don't return to userspace after freezing the fs with a mutex held". After reversing this change, the problem goes away. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- 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
