he problem is may very old. But I have searched this maillist by google.The messages are so much but none can help me. So ask for help here.
It's about the patch linux-2.4.18-lvm-VFSlock.patch. The kernel is linux-2.4.21-47EL with above patch been patched. And I also have tried this two patch linux-2.4.21-VFS-lock.patch linux-2.4.21-VFS-lock-erperimental.patch(See attached files) The xfs come from linux-2.4-xfs(http://oss.sgi.com/projects/xfs/). The xfsprogs version is 2.6.13 The lvm version is 1.0.8 Steps to reproduce this problem: 1: Assume a LV(/dev/testvg/testlv) has been created. mkfs.xfs this LV.(mkfs.xfs /dev/testvg/testlv) mount it on directory /LVM. (mount /dev/testvg/testlv /LVM) 2. xfs_freeze -f /LVM 3. lvcreate -L100M -snTEST_SNAPSHOT /dev/testvg/testlv 4. xfs_freeze -u /LVM 5. umount /LVM The the umount command will not return forever, something operator may also hang there as sync. In 2.6.9, after xfs_freeze -f, the operator lvcreate a snapshot may hang. Only xfs_freeze -u in another session. the snapshot can be done.So in 2.4 also should be done like this, It's the problem about the lock s_umount(in fs/super.c) or the lock bd_mount_sem(fs/buffer.c in 2.6kernel).
Thanks && Best Regards Wei Kong _________________________________________________________________与联机的朋友进行交流，请使用 MSN Messenger: http://messenger.msn.com/cn
Attachment:
linux-2.4.21-VFS-lock.patch
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linux-2.4.21-VFS-lock-experimental.patch
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