On Thu 15-08-13 15:15:04, Andrew Morton wrote: > On Mon, 15 Jul 2013 11:45:14 +0200 Jan Kara <jack@xxxxxxx> wrote: > > > In case when system contains no dirty pages, wakeup_flusher_threads() > > will submit WB_SYNC_NONE writeback for 0 pages so wb_writeback() exits > > immediately without doing anything. Thus sync(1) will write all the > > dirty inodes from a WB_SYNC_ALL writeback pass which is slow. > > > > Fix the problem by using get_nr_dirty_pages() in > > wakeup_flusher_threads() instead of calculating number of dirty pages > > manually. That function also takes number of dirty inodes into account. > > Fair enough. > > > CC: stable@xxxxxxxxxxxxxxx > > Unexpected. What was your thinking here? Right, probably the problem isn't serious enough. Just discard the CC please. Thanks! Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- 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
