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    SubjectRe: [RFC] Slimming down struct inode
    Nathan Scott writes:
    > On Tue, Jun 13, 2006 at 05:00:59PM +0300, Avi Kivity wrote:
    > > Nathan Scott wrote:
    > > > Such a change would would indeed break XFS, in exactly the way you
    > Oh, I should clarify - the suggestion of using sb->s_blocksize/
    > s_blocksize_bits was what I meant by "would break XFS".
    > > > suggest Jan - the realtime subvolume does typically use a different
    > > > blocksize from the data subvolume (the realtime extent size is used,
    > > > and this can be set per-inode too), and there would now be no way to
    > > > distinguish this preferred IO size difference.
    > >
    > > It can be made into an inode operation:
    > *nod* - that'd work fine for our needs here.

    Sorry, but why this operation is needed? Generic code (in fs/*.c)
    doesn't use ->i_blksize at all. If XFS wants to provide per-inode
    st_blksize, all it has to do is to store preferred buffer size in its
    file system specific inode (struct xfs_inode), and use something
    different from generic_fillattr() as its ->i_op->getattr() callback

    > cheers.
    > --
    > Nathan

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