On Mon 27-11-17 16:49:34, Yafang Shao wrote: > 2017-11-27 16:37 GMT+08:00 Michal Hocko <mhocko@xxxxxxxx>: > > On Mon 27-11-17 16:32:42, Yafang Shao wrote: > >> 2017-11-27 16:29 GMT+08:00 Yafang Shao <laoar.shao@xxxxxxxxx>: [...] > >> > It will help us to find the error if we don't change these values like this. > >> > > >> > >> And actually it help us find another issue that when availble_memroy > >> is too small, the thresh and bg_thresh will be 0, that's absolutely > >> wrong. > > > > Why is it wrong? > > -- > > For example, the writeback threads will be wakeup on every write. > I don't think it is meaningful to wakeup the writeback thread when the > dirty pages is very low. Well, this is a corner situation when we are out of memory basically. Doing a wake up on the flusher is the least of your problem. So _why_ exactly is this is problem? -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
