On Tue, Jun 22, 2010 at 09:52:34PM +0800, Wu Fengguang wrote: > 2) most writeback will be submitted by one per-bdi-flusher, so no worry > of cache bouncing (this also means the per CPU counter error is > normally bounded by the batch size) What counter are we talking about exactly? Once balanance_dirty_pages stops submitting I/O the per-bdi flusher thread will in fact be the only thing submitting writeback, unless you count direct invocations of writeback_single_inode. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>