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| author |   James Morris <james.morris@microsoft.com> | 2018-09-04 11:35:54 -0700 |
|---|---|---|
| committer | James Morris <james.morris@microsoft.com> | 2018-09-04 11:35:54 -0700 |
| commit | e42f6f9be4f83c537aa81b4c6239ea94ff5b29ce (patch) | |
| tree | f956a5ea0e83fc6d0df3e64681e7bbc1f201f3ee /kernel/hung_task.c | |
| parent | security/capabilities: remove check for -EINVAL (diff) | |
| parent | Linux 4.19-rc2 (diff) | |
| download | linux-dev-e42f6f9be4f83c537aa81b4c6239ea94ff5b29ce.tar.xz linux-dev-e42f6f9be4f83c537aa81b4c6239ea94ff5b29ce.zip | |
Merge tag 'v4.19-rc2' into next-general
Sync to Linux 4.19-rc2 for downstream developers.
Diffstat (limited to '')
| -rw-r--r-- | kernel/hung_task.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 32b479468e4d..b9132d1269ef 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -40,6 +40,11 @@ int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT; */ unsigned long __read_mostly sysctl_hung_task_timeout_secs = CONFIG_DEFAULT_HUNG_TASK_TIMEOUT; +/* + * Zero (default value) means use sysctl_hung_task_timeout_secs: + */ +unsigned long __read_mostly sysctl_hung_task_check_interval_secs; + int __read_mostly sysctl_hung_task_warnings = 10; static int __read_mostly did_panic; @@ -98,8 +103,11 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) if (switch_count != t->last_switch_count) { t->last_switch_count = switch_count; + t->last_switch_time = jiffies; return; } + if (time_is_after_jiffies(t->last_switch_time + timeout * HZ)) + return; trace_sched_process_hang(t); @@ -245,8 +253,13 @@ static int watchdog(void *dummy) for ( ; ; ) { unsigned long timeout = sysctl_hung_task_timeout_secs; - long t = hung_timeout_jiffies(hung_last_checked, timeout); + unsigned long interval = sysctl_hung_task_check_interval_secs; + long t; + if (interval == 0) + interval = timeout; + interval = min_t(unsigned long, interval, timeout); + t = hung_timeout_jiffies(hung_last_checked, interval); if (t <= 0) { if (!atomic_xchg(&reset_hung_task, 0)) check_hung_uninterruptible_tasks(timeout); |