On Thu, Sep 18, 2014 at 06:46:21AM +0000, Dexuan Cui wrote: > > I've got the answer: > ext2.ko itself does support fsfreeze, but typical linux distros don't supply > ext2.ko at all now -- instead, they usually supply ext3.ko and have ext4 builtin. > > So when I mount an ext2 partition, actually the kernel is registering the ext4 > driver as an ext2 driver and in this case the ext2's s_op->freeze_fs is NULL -- > but, why did ext4 choose this behavior for ext2? It wasn't a deliberate design choice. It was just that when no-journal mode was added to ext4, freeeze support was never implemented, and up until now, no one had asked for it. We can add it to ext4; thanks for calling it to our attention. Cheers, - Ted -- 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
