https://bugzilla.kernel.org/show_bug.cgi?id=15906 Summary: serious performance regression in "umount" on ext4 over LVM Product: File System Version: 2.5 Kernel Version: 2.6.33 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 AssignedTo: fs_ext4@xxxxxxxxxxxxxxxxxxxx ReportedBy: kees@xxxxxxxxxxx Regression: Yes As root, if /tmp is on an LV (or possibly even without this): cd /tmp dd if=/dev/zero of=test.ext4 bs=1 count=1 seek=1G mkfs.ext4 -F test.ext4 mkdir -p /mnt/test mount -o loop test.ext4 /mnt/test echo $(seq 65536) | (cd /mnt/test; xargs touch) time umount /mnt/test Prior to 2.6.32, this took a second or so. Now it takes over a minute. Reproduced in both Ubuntu 10.04 (2.6.32) and Fedora 12 (2.6.33). https://bugs.launchpad.net/ubuntu/+source/linux/+bug/543617 The current Ubuntu work-around is only useful on an otherwise idle system. -- 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
