// SPDX-License-Identifier: GPL-2.0 | |
#include <stdio.h> | |
#include "api/fs/fs.h" | |
#include "util/group.h" | |
/* | |
* Check whether we can use a group for top down. | |
* Without a group may get bad results due to multiplexing. | |
*/ | |
bool arch_topdown_check_group(bool *warn) | |
{ | |
int n; | |
if (sysctl__read_int("kernel/nmi_watchdog", &n) < 0) | |
return false; | |
if (n > 0) { | |
*warn = true; | |
return false; | |
} | |
return true; | |
} | |
void arch_topdown_group_warn(void) | |
{ | |
fprintf(stderr, | |
"nmi_watchdog enabled with topdown. May give wrong results.\n" | |
"Disable with echo 0 > /proc/sys/kernel/nmi_watchdog\n"); | |
} |