From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>,
<linux-snps-arc@lists.infradead.org>
Cc: <linux-kernel@vger.kernel.org>,
Christian Ruppert <christian.ruppert@alitech.com>,
Noam Camus <noamca@mellanox.com>,
"Vineet Gupta" <Vineet.Gupta1@synopsys.com>,
Alexey Brodkin <Alexey.Brodkin@synopsys.com>,
Zakharov Vlad <Vladislav.Zakharov@synopsys.com>
Subject: Re: [PATCH] ARC: [*defconfigs] Enable hung tasks detection
Date: Thu, 21 Jul 2016 09:17:29 -0700 [thread overview]
Message-ID: <7c0e3361-cb65-b846-2b73-0715400b31d1@synopsys.com> (raw)
In-Reply-To: <1469112735-26448-1-git-send-email-Eugeniy.Paltsev@synopsys.com>
On 07/21/2016 07:52 AM, Eugeniy Paltsev wrote:
> Enable the kernel to detect "hung tasks",
> which are bugs that cause the task to be stuck in
> uninterruptible "D" state indefinitiley.
spellos above
> Note we're setting HUNG_TASK_TIMEOUT to 10 seconds instead of
> default 120 to shorten time required for detection of hung task,
> as it set in axs101, axs103 and axs103_smp boards defconfigs.
In some of the actual hang scenarios (on FPGA boards atleast) I was debugging, the
hung task seemed redundant actually as I was getting RCU stall msgs as well. Do
you not see something similar.
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
>
> Cc: Christian Ruppert <christian.ruppert@alitech.com>
> Cc: Noam Camus <noamca@mellanox.com>
> Cc: Vineet Gupta <vgupta@synopsys.com>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Zakharov Vlad <vzakhar@synopsys.com>
> ---
> arch/arc/configs/nps_defconfig | 2 ++
> arch/arc/configs/nsim_700_defconfig | 2 ++
> arch/arc/configs/nsim_hs_defconfig | 2 ++
> arch/arc/configs/nsim_hs_smp_defconfig | 2 ++
> arch/arc/configs/nsimosci_defconfig | 2 ++
> arch/arc/configs/nsimosci_hs_defconfig | 3 +++
> arch/arc/configs/nsimosci_hs_smp_defconfig | 3 +++
> arch/arc/configs/tb10x_defconfig | 1 +
> 8 files changed, 17 insertions(+)
>
> diff --git a/arch/arc/configs/nps_defconfig b/arch/arc/configs/nps_defconfig
> index ede625c..39ccacd 100644
> --- a/arch/arc/configs/nps_defconfig
> +++ b/arch/arc/configs/nps_defconfig
> @@ -81,4 +81,6 @@ CONFIG_DEBUG_INFO=y
> # CONFIG_ENABLE_MUST_CHECK is not set
> CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_MEMORY_INIT=y
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> CONFIG_ENABLE_DEFAULT_TRACERS=y
> diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig
> index 7314f53..78c3070 100644
> --- a/arch/arc/configs/nsim_700_defconfig
> +++ b/arch/arc/configs/nsim_700_defconfig
> @@ -61,4 +61,6 @@ CONFIG_TMPFS=y
> CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> # CONFIG_DEBUG_PREEMPT is not set
> diff --git a/arch/arc/configs/nsim_hs_defconfig b/arch/arc/configs/nsim_hs_defconfig
> index a99dc7a..c6a0a30 100644
> --- a/arch/arc/configs/nsim_hs_defconfig
> +++ b/arch/arc/configs/nsim_hs_defconfig
> @@ -59,4 +59,6 @@ CONFIG_TMPFS=y
> CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> # CONFIG_DEBUG_PREEMPT is not set
> diff --git a/arch/arc/configs/nsim_hs_smp_defconfig b/arch/arc/configs/nsim_hs_smp_defconfig
> index 59f221f..10c5e5e 100644
> --- a/arch/arc/configs/nsim_hs_smp_defconfig
> +++ b/arch/arc/configs/nsim_hs_smp_defconfig
> @@ -58,3 +58,5 @@ CONFIG_TMPFS=y
> CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig
> index 42bafa5..973ce41 100644
> --- a/arch/arc/configs/nsimosci_defconfig
> +++ b/arch/arc/configs/nsimosci_defconfig
> @@ -71,3 +71,5 @@ CONFIG_TMPFS=y
> CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> diff --git a/arch/arc/configs/nsimosci_hs_defconfig b/arch/arc/configs/nsimosci_hs_defconfig
> index 4bb60c1..c0b99d7 100644
> --- a/arch/arc/configs/nsimosci_hs_defconfig
> +++ b/arch/arc/configs/nsimosci_hs_defconfig
> @@ -70,3 +70,6 @@ CONFIG_TMPFS=y
> CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> +CONFIG_DEBUG_KERNEL=y
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig b/arch/arc/configs/nsimosci_hs_smp_defconfig
> index 7e88f4c..4012585 100644
> --- a/arch/arc/configs/nsimosci_hs_smp_defconfig
> +++ b/arch/arc/configs/nsimosci_hs_smp_defconfig
> @@ -84,3 +84,6 @@ CONFIG_NFS_FS=y
> # CONFIG_ENABLE_WARN_DEPRECATED is not set
> # CONFIG_ENABLE_MUST_CHECK is not set
> CONFIG_FTRACE=y
> +CONFIG_DEBUG_KERNEL=y
> +CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig
> index 4c51183..e8a96eb 100644
> --- a/arch/arc/configs/tb10x_defconfig
> +++ b/arch/arc/configs/tb10x_defconfig
> @@ -104,6 +104,7 @@ CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_MEMORY_INIT=y
> CONFIG_DEBUG_STACKOVERFLOW=y
> CONFIG_DETECT_HUNG_TASK=y
> +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
> CONFIG_SCHEDSTATS=y
> CONFIG_TIMER_STATS=y
> # CONFIG_CRYPTO_HW is not set
>
next prev parent reply other threads:[~2016-07-21 16:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-21 14:52 Eugeniy Paltsev
2016-07-21 16:17 ` Vineet Gupta [this message]
2016-07-21 17:04 ` Eugeniy Paltsev
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