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Groups > linux.kernel > #1447938 > unrolled thread
| Started by | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> |
|---|---|
| First post | 2016-07-21 17:00 +0200 |
| Last post | 2016-07-21 19:10 +0200 |
| Articles | 3 — 2 participants |
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[PATCH] ARC: [*defconfigs] Enable hung tasks detection Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2016-07-21 17:00 +0200
Re: [PATCH] ARC: [*defconfigs] Enable hung tasks detection Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2016-07-21 18:20 +0200
Re: [PATCH] ARC: [*defconfigs] Enable hung tasks detection Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2016-07-21 19:10 +0200
| From | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> |
|---|---|
| Date | 2016-07-21 17:00 +0200 |
| Subject | [PATCH] ARC: [*defconfigs] Enable hung tasks detection |
| Message-ID | <rXnCa-kD-9@gated-at.bofh.it> |
Enable the kernel to detect "hung tasks", which are bugs that cause the task to be stuck in uninterruptible "D" state indefinitiley. 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. 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 -- 2.5.5
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| From | Vineet Gupta <Vineet.Gupta1@synopsys.com> |
|---|---|
| Date | 2016-07-21 18:20 +0200 |
| Message-ID | <rXoRA-1m6-27@gated-at.bofh.it> |
| In reply to | #1447938 |
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 >
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| From | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> |
|---|---|
| Date | 2016-07-21 19:10 +0200 |
| Message-ID | <rXpDX-1We-5@gated-at.bofh.it> |
| In reply to | #1447989 |
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@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 > >
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