Content STOP DOING OS • CPUS WERE NOT MEANT TO BE SHARED! • YEARS OF SCHEDULERS yet NO REAL-WORLD USE FOUND for running more than one task at a time! • Wanted to terminate a process? We had a tool for that. It was called manual restart. • "Please give me 30 bytes of virtual memory. Please allocate it on the heap. ' - Statements dreamed up by evil wizards. LOOK at what kernel developers have been demanding your respect for all this time, with all the memory and CPUS we built for them. (This is REAL KERNEL CODE, done by REAL KERNEL DEVS): prev_state = READ_ONCE(prev->__state); if (sched mode == SM IDLE) { * This is how we return from a fork. * SCX must consult the BPF scheduler to if (Irq->nr_running 88 !scx_enabled()) { i SYM_CODE_START(ret_from_fork) next = prev; bl schedule_tail goto picked; cbz x19, 1f MOV x0, x20 } else if (! preempt 8& prev_state) { try_to_block_task(rq, prev, prev_state); switch_count = &prev->nvcsw; blr X19 1: get_current_task tsk MoV X0, sp } bl asm_exit_to_user_mode ret_to_user next = pick_next_task(rq, prev, &rf); rq_set_donor(rq, next); SYM_CODE_END(ret_from_fork) NOKPROBE(ret_from_fork) STOCALE UEFANEX drag pushO: __diag_ignore(GCC, 8, "-Wattribute-alias", dancinkage cong sysomndnes Marta, aC vecc, VA AKUS_/ attribute (altas( stringity( se systanane)))); ONGsystanane, ERRNO); _do_systinare(__MAP(X,__SC_DECL,_VA_ARGS_ _se_sysmenare(__MAP(X,__SC_LONG,__VA_ARGS__)): se sysauname MAP(X, SC LONG,VA ARGS_)) do sussunare MAP(X. SC CAST, VA ARGS. _MAP(X, __SC_TEST,__VA_ARGS_ -PROTECT(x, ret,__MAP(X, __SC_ARGS, _VA_ARGS__)): 10000 94 static inline long SYSCALL DESTEX - do systanare (_MaP(X, _ SC_DECL, _ VA ARGS_ ????? ?????? ??????????? Hello I would like to a process please. They have played us for absolute fools.