A number of people have mentioned having problems unmounting because of
mysterious files remaining in use. The attached patch is very helpful
for tracking down this kind of problem, as it gives a report of busy
inode names and numbers whenever you unmount a volume.
Not all of the busy inodes reported are necessarily open for writing, so
it's normal to have some inodes in use on the root.
Anyway, hope this is helpful ...
Regards,
Bill
--------------FE773FB23EF1B8F4934D07B6
Content-Type: text/plain; charset=us-ascii; name="inode_busy-patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline; filename="inode_busy-patch"
--- linux-2.1.121/fs/inode.c.old Thu Sep 10 08:07:04 1998
+++ linux-2.1.121/fs/inode.c Thu Sep 10 08:22:06 1998
@@ -281,6 +281,8 @@
inode = list_entry(tmp, struct inode, i_list);
if (inode->i_sb != sb)
continue;
+ if (sb->s_root && inode == sb->s_root->d_inode)
+ continue;
if (!inode->i_count) {
list_del(&inode->i_hash);
INIT_LIST_HEAD(&inode->i_hash);
@@ -290,6 +292,40 @@
}
busy = 1;
}
+
+#ifdef INODE_PARANOIA
+ /*
+ * Display the busy inodes
+ */
+ if (busy) {
+ struct list_head * tmp;
+ struct inode * inode;
+ char *pname, *fname;
+
+ printk("Busy Inodes for Device %s:\n", kdevname(sb->s_dev));
+ for (tmp = head->next; tmp != head; tmp = tmp->next) {
+ inode = list_entry(tmp, struct inode, i_list);
+ if (inode->i_sb != sb)
+ continue;
+ if (sb->s_root && inode == sb->s_root->d_inode)
+ continue;
+ if (!inode->i_count)
+ continue;
+ pname = "";
+ fname = "";
+ if (!list_empty(&inode->i_dentry)) {
+ struct dentry * dentry;
+ dentry = list_entry(inode->i_dentry.next,
+ struct dentry, d_alias);
+ pname = (char *) dentry->d_parent->d_name.name;
+ fname = (char *) dentry->d_name.name;
+ }
+ printk("inode %s/%s(%ld): count=%d, state=%lx\n",
+ pname, fname, inode->i_ino, inode->i_count,
+ inode->i_state);
+ }
+ }
+#endif
return busy;
}
--- linux-2.1.121/fs/super.c.old Tue Sep 1 21:40:19 1998
+++ linux-2.1.121/fs/super.c Thu Sep 10 08:22:06 1998
@@ -623,11 +657,15 @@
struct dentry * root = sb->s_root;
struct dentry * covered = root->d_covers;
- if (root->d_count != 1)
+ if (root->d_count != 1) {
+ printk("d_umount: root d_count=%d\n", root->d_count);
return -EBUSY;
+ }
- if (root->d_inode->i_state)
+ if (root->d_inode->i_state) {
+ printk("d_umount: root inode busy\n");
return -EBUSY;
+ }
sb->s_root = NULL;
@@ -702,9 +740,10 @@
retval = 0;
if (!(sb->s_flags & MS_RDONLY))
retval = do_remount_sb(sb, MS_RDONLY, 0);
- return retval;
+ goto out;
}
+ invalidate_inodes(sb);
retval = d_umount(sb);
if (retval)
goto out;
--------------FE773FB23EF1B8F4934D07B6--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/