[XFS] Combine the XFS and Linux inodes
To avoid issues with different lifecycles of XFS and Linux inodes, embedd the linux inode inside the XFS inode. This means that the linux inode has the same lifecycle as the XFS inode, even when it has been released by the OS. XFS inodes don't live much longer than this (a short stint in reclaim at most), so there isn't significant memory usage penalties here. Version 3 o kill xfs_icount() Version 2 o remove unused commented out code from xfs_iget(). o kill useless cast in VFS_I() SGI-PV: 988141 SGI-Modid: xfs-linux-melb:xfs-kern:32323a Signed-off-by: NDavid Chinner <david@fromorbit.com> Signed-off-by: NLachlan McIlroy <lachlan@sgi.com> Signed-off-by: NChristoph Hellwig <hch@infradead.org>
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