On Wed, 01 Aug 2007 12:24:18 +1000, David Chinner <dgc@xxxxxxx> wrote:
On Tue, Jul 31, 2007 at 05:49:18PM -0700, Michael Nishimoto wrote:
What are your plans for adding CRCs to other metadata objects?
Other objects will require some on-disk format change, and that will
require a feature bit to be set.
Basically, we can add CRCs to individual inodes without a version bump
as we have some empty space in the v2 inode core. That will make v2
inodes
the default, but we already have a superblock bit for that and all
versions
of linux support v2 inodes so there is no issue there. This will require
userspace tool changes, though, because tools like repair will revert v2
inodes back to v1 format if the are not using project id's or the link
count
fits into 16 bits.....
No, repair does not revert v2 inodes back to v1. Currently, inodes
are created as v1 in the kernel and moved to v2 as required.
Barry.
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