This serious revamps a lot of the way we do the block mapping for writeback. It gets rid of the xfs_iomap interface and now calls xfs_bmapi directly from __xfs_get_blocks and xfs_vm_writepage, and simplifies the code in writepage a lot. It removes about 200 lines of code and a superflous radix tree lookup for already allocated blocks. It also shows a pretty clear path to how we can get rid of buffer heads. The new writepage code shows that we rely very little on buffers for writeback - I think we can relatively easy switch it from looping over bufferheads to loop over the xfs_bmapi results and it will still work. We'll need some more work on the get_blocks and truncate side, but I think we can pretty easily remove the buffer heads in XFS without any replacement and just rely on the extent cache in the inode underneath xfs_bmapi. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
