On Tue, Jun 22, 2010 at 10:31:24PM +0800, Christoph Hellwig wrote: > 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 bdi_stat(bdi, BDI_WRITTEN) introduced in this patch. > 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. Right. Thanks, Fengguang -- 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>