On Fri 17-11-17 20:45:03, Shawn Landden wrote: > On Fri, Nov 3, 2017 at 2:09 AM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > > On Thu 02-11-17 23:35:44, Shawn Landden wrote: > > > It is common for services to be stateless around their main event loop. > > > If a process sets PR_SET_IDLE to PR_IDLE_MODE_KILLME then it > > > signals to the kernel that epoll_wait() and friends may not complete, > > > and the kernel may send SIGKILL if resources get tight. > > > > > > See my systemd patch: https://github.com/shawnl/systemd/tree/prctl > > > > > > Android uses this memory model for all programs, and having it in the > > > kernel will enable integration with the page cache (not in this > > > series). > > > > > > 16 bytes per process is kinda spendy, but I want to keep > > > lru behavior, which mem_score_adj does not allow. When a supervisor, > > > like Android's user input is keeping track this can be done in > > user-space. > > > It could be pulled out of task_struct if an cross-indexing additional > > > red-black tree is added to support pid-based lookup. > > > > This is still an abuse and the patch is wrong. We really do have an API > > to use I fail to see why you do not use it. > > > When I looked at wait_queue_head_t it was 20 byes. I do not understand. What I meant to say is that we do have a proper user api to hint OOM killer decisions. -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
