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Subject[PATCH] [RESEND] rlimits: Print more information when limits are exceeded
Date
This dumps some information in logs when a process exceeds its CPU or RT
limits (soft and hard). Makes debugging easier when userspace triggers
these limits.

Signed-off-by: Arun Raghavan <arun.raghavan@collabora.co.uk>
---
kernel/posix-cpu-timers.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 125cb67..bb0ae71 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -956,6 +956,9 @@ static void check_thread_timers(struct task_struct *tsk,
* At the hard limit, we just die.
* No need to calculate anything else now.
*/
+ printk(KERN_INFO
+ "RT Watchdog Timeout (hard): %s[%d]\n",
+ tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGKILL, SEND_SIG_PRIV, tsk);
return;
}
@@ -968,7 +971,7 @@ static void check_thread_timers(struct task_struct *tsk,
sig->rlim[RLIMIT_RTTIME].rlim_cur = soft;
}
printk(KERN_INFO
- "RT Watchdog Timeout: %s[%d]\n",
+ "RT Watchdog Timeout (soft): %s[%d]\n",
tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);
}
@@ -1116,6 +1119,9 @@ static void check_process_timers(struct task_struct *tsk,
* At the hard limit, we just die.
* No need to calculate anything else now.
*/
+ printk(KERN_INFO
+ "CPU Watchdog Timeout (hard): %s[%d]\n",
+ tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGKILL, SEND_SIG_PRIV, tsk);
return;
}
@@ -1123,6 +1129,9 @@ static void check_process_timers(struct task_struct *tsk,
/*
* At the soft limit, send a SIGXCPU every second.
*/
+ printk(KERN_INFO
+ "CPU Watchdog Timeout (soft): %s[%d]\n",
+ tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);
if (soft < hard) {
soft++;
--
1.7.8.4


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