This series adds a per-filesystem LRU to the buffer cache. When combined with a shrinker per filesystem, this enables us to prioritise reclaim of buffers under memory pressure. This solves the current problem of page cache reclaim having no concept of what the pages actually contain in deciding which pages to reclaim. The LRU is lazily updated, meaning that we only access the LRU lists and locks when the last reference to a buffer goes away. As a result, there is no impact to the hot buffer lookup path and we are not constantly moving buffers around in the LRU. This series effectively means that the buffer cache can now be made independent of the page cache as we now have our own optimised buffer cache reclaim mechanisms. Version 2: - removed buffer lru addition during xfs_buf_find() as it is done lazily on the last reference going away. - removed buffer type additions and used the existing macro to just set the reference value. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
