Re: [PATCH RFC DRAFT DOESNOTBUILD] inode: free up more space

[Christoph Hellwig <hch@lst.de>]

On Wed, Jul 16, 2025 at 03:08:53PM +0100, Matthew Wilcox wrote:
> struct filemap_inode {
> 	struct inode		inode;
> 	struct address_space	i_mapping;
> 	struct fscrypt_struct	i_fscrypt;
> 	struct fsverity_struct	i_fsverity;
> 	struct quota_struct	i_quota;
> };
> 
> struct ext4_inode {
> 	struct filemap_inode inode;
> 	...
> };
> 
> saves any messing with i_ops and offsets.

I still wastest a lot of space for XFS which only needs inode
and i_mapping of those.  As would most ext4 file systems..