Re: [Ext2-devel] [PATCH 2/9] sector_t format string

From: Roman Zippel
Date: Thu Aug 10 2006 - 12:35:43 EST


On Thu, 10 Aug 2006, Theodore Tso wrote:

> Ext4 will support a 48-bit blocknumber format for extents, but I do
> want to make ext4 suitable as a general purpose filesystem, and 32-bit
> systems will be around for I fear far longer than people might wish.
> So while I agree that we shouldn't go _too_ far out of our way to make
> things efficient on 32-bit systems, if it's not that much work to
> support a 32-bit sector_t, we ought to do it.
> So how about a compromise? We allow for a 32-bit sector_t in ext4,
> but we drop the SECTOR_FMT, and rely on %llu and typecasts in
> printk's. Then the only other extra hair in the filesystem code will
> be a mount-time check to make sure we don't try to mount a large
> filesystem on system with a 32-bit sector_t.

Thanks, that's what I was hoping for. :)
Disallowing to mount large fs without CONFIG_LBD is not a real problem and
then also truncation is not an issue anymore (except maybe for e2fsck).

bye, Roman
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