Messages in this thread | | | Date | Fri, 20 Apr 2001 02:35:28 -0400 | From | Theodore Tso <> | Subject | Re: [Ext2-devel] ext2 inode size (on-disk) |
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On Thu, Apr 19, 2001 at 10:23:39PM -0400, Alexander Viro wrote: > > I'm somewhat concerned about the following: last block of inode table > fragment may have less inodes than the rest. Reason: number of inodes > per group should be a multiple of 8 and with inodes bigger than 128 > bytes it may give such effect. Comments?
Yup, that's right. That shouldn't be too bad, though, since we already calculate things by dividing by INODES_PER_BLOCK_GROUP. So the fact that the last block of the inode table may have some unused space shouldn't be a problem.
> I would really, really like to end up with accurate description of > inode table layout somewhere in Documentation/filesystems. Heck, I > volunteer to write it down and submit into the tree ;-)
The "design and implementation of ext2" paper has a pretty good explanation of the inode table, but of course it assumed a convenient inode size of 128, and didn't really go into the issues of what might happen if the inode size were larger, or not a power of two.
So yeah, getting something which explains how things work now that things have gotten a bit more complicated would be a good thing.
- Ted
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