On Fri, May 09, 2008 at 08:08:41PM -0700, Christoph Lameter wrote: > Defragmentation support for buffer heads. We convert the references to > buffers to struct page references and try to remove the buffers from > those pages. If the pages are dirty then trigger writeout so that the > buffer heads can be removed later. Oh, no, please don't trigger more random single page writeback from memory reclaim. We shoul dbe killing the VM's use of ->writepage, not encouraging it. If you are going to clean bufferheads (or pages), please clean entire mappings via ->writepages as it leads to far superior I/O patterns and a far higher aggregate rate of page cleaning..... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
