Sean Neakums <sneakums@xxxxxxxx> writes: > "Theodore Ts'o" <tytso@xxxxxxx> writes: > >> On Wed, Oct 29, 2003 at 07:52:23PM +0000, Sean Neakums wrote: >>> Just now I ran tune2fs -j on the root filesystem of a box running >>> 2.6.0-test8. Then I edited /etc/fstab and changed the FS type to from >>> ext2 to ext3, saved the file, and invoked vim on the file again. A >>> few moments after this, the box hung. Unfortunately X was running at >>> the time, and so I don't have any messages to cite. >>> >>> Is this a known problem? >> >> This is the first time anyone has reported anything like this. All >> tune2fs -j does on a mounted filesystem is to create a normal file >> (which is used for the journal), mark it immutable, and the modify the >> superblock to set the has_journal flag and set the journal inode >> number. None of this should cause a kernel hang. > > I was rather taken aback myself. > >> What version of e2fsprogs/tune2fs were you using? > > tune2fs -V reports "tune2fs 1.35-WIP (21-Aug-2003)" > > Obtained from Debian package e2fsprogs version 1.34+1.35-WIP-2003.08.21-3. I tried reproducing this on my laptop, which also had an ext2 root and was also running 2.6.0-test8. I ran the tune2fs -j (same version and source as above) and updated /etc/fstab as before. Nothing seemed to be breaking, so I went ahead and built 2.6.0-test9 in my homedir, which is on a separate volume (/ and /boot are regular partitions; /home, /usr and /var are lvm2 volumes. The other box has a similar configuration.). When I ran make modules_install, messages of the following form began streaming on the console: block=X, b_blocknr=X b_state=0x00000000(?), b_size=1024 The Xes are numbers that I couldn't make out due to the messages streaming so fast. b_blocknr seemed to be changing, although I don't know if there were repeats. I'm fairly sure but not certain that b_state was 0x00000000. The filesystem itself has 1024-byte blocks. I had a quick grep around, and this message seems to come from fs/buffer.c:__find_get_block_slow(). _______________________________________________ Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
