On Tue 30-01-18 02:56:51, He, Roger wrote: > Hi Michal: > > We need a API to tell TTM module the system totally has how many swap > cache. Then TTM module can use it to restrict how many the swap cache > it can use to prevent triggering OOM. For Now we set the threshold of > swap size TTM used as 1/2 * total size and leave the rest for others > use. Why do you so much memory? Are you going to use TB of memory on large systems? What about memory hotplug when the memory is added/released? > But get_nr_swap_pages is the only API we can accessed from other > module now. It can't cover the case of the dynamic swap size > increment. I mean: user can use "swapon" to enable new swap file or > swap disk dynamically or "swapoff" to disable swap space. Exactly. Your scaling configuration based on get_nr_swap_pages or the available memory simply sounds wrong. -- 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>
