Hi, Not every time. For example, last time I debug mmap3?LTP's test, which? stuck in "D" state, I didn't recieve any messages until I enabled this option.?This happends on nsim 700. On Thu, 2016-07-21 at 09:17 -0700, Vineet Gupta wrote: > 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 at synopsys.com> > > > > Cc: Christian Ruppert <christian.ruppert at alitech.com> > > Cc: Noam Camus <noamca at mellanox.com> > > Cc: Vineet Gupta <vgupta at synopsys.com> > > Cc: Alexey Brodkin <abrodkin at synopsys.com> > > Cc: Zakharov Vlad??<vzakhar at 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 > >
