Messages in this thread | | | Date | Thu, 31 Oct 2002 22:35:14 -0500 (EST) | From | Alexander Viro <> | Subject | Re: [PATCH] 2/11 Ext2/3 Updates: Extended attributes, ACL, etc. |
| |
On Thu, 31 Oct 2002, Theodore Ts'o wrote:
> I'm not sure ext2meta will be sufficient. It's not just a matter of > modifying the on-disk metadata, as would be needed for defrag, but I > would also need to modify some of the in-core data structions in the > ext2/3 filesystem data structures. For example, when you resize the > filesystem, you need to increase the number of group descriptors, > which means you need to kmalloc, copy, and then kfree sbi->group_desc > out from under the mounted filesystem. > > No doubt ext2meta could be modified so it could "reach out and touch" > internal ext2/3 fileststem data structures in core. But the locking > issues involved get really messy.
For all practical purposes, ext2meta is part of ext2 - same driver, two filesystem types. Locking isn't that scary, BTW - I'd looked into that some time ago and it looked feasible.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |