diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 24 | ||||
| -rw-r--r-- | init/main.c | 10 |
2 files changed, 31 insertions, 3 deletions
diff --git a/init/Kconfig b/init/Kconfig index 1e234e2f1cba..a4112e95724a 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -415,6 +415,11 @@ config IRQ_TIME_ACCOUNTING If in doubt, say N here. +config HAVE_SCHED_AVG_IRQ + def_bool y + depends on IRQ_TIME_ACCOUNTING || PARAVIRT_TIME_ACCOUNTING + depends on SMP + config BSD_PROCESS_ACCT bool "BSD Process Accounting" depends on MULTIUSER @@ -485,6 +490,25 @@ config TASK_IO_ACCOUNTING Say N if unsure. +config PSI + bool "Pressure stall information tracking" + help + Collect metrics that indicate how overcommitted the CPU, memory, + and IO capacity are in the system. + + If you say Y here, the kernel will create /proc/pressure/ with the + pressure statistics files cpu, memory, and io. These will indicate + the share of walltime in which some or all tasks in the system are + delayed due to contention of the respective resource. + + In kernels with cgroup support, cgroups (cgroup2 only) will + have cpu.pressure, memory.pressure, and io.pressure files, + which aggregate pressure stalls for the grouped tasks only. + + For more details see Documentation/accounting/psi.txt. + + Say N if unsure. + endmenu # "CPU/Task time and stats accounting" config CPU_ISOLATION diff --git a/init/main.c b/init/main.c index 18f8f0140fa0..1c3f90264280 100644 --- a/init/main.c +++ b/init/main.c @@ -394,7 +394,7 @@ static void __init setup_command_line(char *command_line) static __initdata DECLARE_COMPLETION(kthreadd_done); -static noinline void __ref rest_init(void) +noinline void __ref rest_init(void) { struct task_struct *tsk; int pid; @@ -528,6 +528,11 @@ static void __init mm_init(void) pti_init(); } +void __init __weak arch_call_rest_init(void) +{ + rest_init(); +} + asmlinkage __visible void __init start_kernel(void) { char *command_line; @@ -736,7 +741,7 @@ asmlinkage __visible void __init start_kernel(void) } /* Do the rest non-__init'ed, we're now alive */ - rest_init(); + arch_call_rest_init(); } /* Call all constructor functions linked into the kernel. */ @@ -1064,7 +1069,6 @@ static int __ref kernel_init(void *unused) /* need to finish all async __init code before freeing the memory */ async_synchronize_full(); ftrace_free_init_mem(); - jump_label_invalidate_initmem(); free_initmem(); mark_readonly(); |
