2017-11-27 16:52 GMT+08:00 Michal Hocko <mhocko@xxxxxxxx>: > 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? > -- Are you _sure_ this is the least of the problem on this corner situation ? Why wakeup the bdi writeback ? why not just kill the program and flush the date into the Disk when we do oom ? Thanks Yafang -- 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>
