#include <linux/hugetlb.h>
#include <linux/start_kernel.h>
#include <linux/screen_info.h>
+#include <linux/tick.h>
#include <asm/setup.h>
#include <asm/sections.h>
#include <asm/cacheflush.h>
static int __init setup_isolnodes(char *str)
{
- char buf[MAX_NUMNODES * 5];
if (str == NULL || nodelist_parse(str, isolnodes) != 0)
return -EINVAL;
- nodelist_scnprintf(buf, sizeof(buf), isolnodes);
- pr_info("Set isolnodes value to '%s'\n", buf);
+ pr_info("Set isolnodes value to '%*pbl'\n",
+ nodemask_pr_args(&isolnodes));
return 0;
}
early_param("isolnodes", setup_isolnodes);
void __init print_disabled_cpus(void)
{
- if (!cpumask_empty(&disabled_map)) {
- char buf[100];
- cpulist_scnprintf(buf, sizeof(buf), &disabled_map);
- pr_info("CPUs not available for Linux: %s\n", buf);
- }
+ if (!cpumask_empty(&disabled_map))
+ pr_info("CPUs not available for Linux: %*pbl\n",
+ cpumask_pr_args(&disabled_map));
}
static void __init setup_cpu_maps(void)
early_param("dataplane", dataplane);
+#ifdef CONFIG_NO_HZ_FULL
+/* Warn if hypervisor shared cpus are marked as nohz_full. */
+static int __init check_nohz_full_cpus(void)
+{
+ struct cpumask shared;
+ int cpu;
+
+ if (hv_inquire_tiles(HV_INQ_TILES_SHARED,
+ (HV_VirtAddr) shared.bits, sizeof(shared)) < 0) {
+ pr_warn("WARNING: No support for inquiring hv shared tiles\n");
+ return 0;
+ }
+ for_each_cpu(cpu, &shared) {
+ if (tick_nohz_full_cpu(cpu))
+ pr_warn("WARNING: nohz_full cpu %d receives hypervisor interrupts!\n",
+ cpu);
+ }
+ return 0;
+}
+arch_initcall(check_nohz_full_cpus);
+#endif
+
#ifdef CONFIG_CMDLINE_BOOL
static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
#endif