diff options
Diffstat (limited to 'src/shared/sleep-config.c')
| -rw-r--r-- | src/shared/sleep-config.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/src/shared/sleep-config.c b/src/shared/sleep-config.c index cd3238b405..5ec7cce458 100644 --- a/src/shared/sleep-config.c +++ b/src/shared/sleep-config.c @@ -163,6 +163,46 @@ int can_sleep_disk(char **types) { return false; } +#define HIBERNATION_SWAP_THRESHOLD 0.98 + +static bool enough_memory_for_hibernation(void) { + _cleanup_free_ char *active = NULL, *swapfree = NULL; + unsigned long long act, swap; + int r; + + r = get_status_field("/proc/meminfo", "\nSwapFree:", &swapfree); + if (r < 0) { + log_error("Failed to retrieve SwapFree from /proc/meminfo: %s", strerror(-r)); + return false; + } + + r = safe_atollu(swapfree, &swap); + if (r < 0) { + log_error("Failed to parse SwapFree from /proc/meminfo: %s: %s", + swapfree, strerror(-r)); + return false; + } + + r = get_status_field("/proc/meminfo", "\nActive(anon):", &active); + if (r < 0) { + log_error("Failed to retrieve Active(anon) from /proc/meminfo: %s", strerror(-r)); + return false; + } + + r = safe_atollu(active, &act); + if (r < 0) { + log_error("Failed to parse Active(anon) from /proc/meminfo: %s: %s", + active, strerror(-r)); + return false; + } + + r = act <= swap * HIBERNATION_SWAP_THRESHOLD; + log_debug("Hibernation is %spossible, Active(anon)=%llu kB, SwapFree=%llu kB, threshold=%.2g%%", + r ? "" : "im", act, swap, 100*HIBERNATION_SWAP_THRESHOLD); + + return r; +} + int can_sleep(const char *verb) { _cleanup_strv_free_ char **modes = NULL, **states = NULL; int r; @@ -175,5 +215,8 @@ int can_sleep(const char *verb) { if (r < 0) return false; - return can_sleep_state(states) && can_sleep_disk(modes); + if (!can_sleep_state(states) || !can_sleep_disk(modes)) + return false; + + return streq(verb, "suspend") || enough_memory_for_hibernation(); } |