Unwind may loop forever if sample is incomplete or bogus. Bound the number of
unw_step() that yield the same IP to prevent infinite loop.
Signed-off-by: Francis Giraldeau francis.girald...@gmail.com
---
tools/perf/util/unwind.c | 8 +++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff
I tested this patch on 4.7 and confirm that irq_work does not occurs anymore on
the isolated cpu. Thanks!
I don't know of any utility to test the task isolation feature, so I started
one:
https://github.com/giraldeau/taskisol
The script exp.sh runs the taskisol to test five different
On 2016-08-29 12:27 PM, Chris Metcalf wrote:
> On 8/16/2016 5:19 PM, Chris Metcalf wrote:
>> Here is a respin of the task-isolation patch set.
>
> No concerns have been raised yet with the v15 version of the patch series
> in the two weeks since I posted it, and I think I have addressed all
>
On 2016-09-07 05:11 PM, Francis Giraldeau wrote:
> The syscall test fails on x86:
> $ sudo ./isolation
> [...]
> test_syscall: FAIL (0x100)
> test_syscall (SIGUSR1): FAIL (0x100)
>
> I wanted to debug this problem with gdb and a KVM virtual machine. However,
&
On 2016-09-07 05:11 PM, Francis Giraldeau wrote:
> The syscall test fails on x86:
> $ sudo ./isolation
> [...]
> test_syscall: FAIL (0x100)
> test_syscall (SIGUSR1): FAIL (0x100)
The fix is indeed very simple:
diff --git a/arch/x86/include/asm/thread_info.h
b/a
On 2016-09-12 08:05 PM, Rafael J. Wysocki wrote:
> On Monday, September 12, 2016 11:15:45 PM Rafael J. Wysocki wrote:
>> On Monday, September 12, 2016 06:14:44 PM Peter Zijlstra wrote:
>>> On Mon, Sep 12, 2016 at 12:01:58PM -0400, Chris Metcalf wrote:
>>>> On 9/7/2
On 2016-09-12 12:01 PM, Chris Metcalf wrote:
> The syscall test fails on x86:
>>
>> $ sudo ./isolation
>> [...]
>> test_syscall: FAIL (0x100)
>> test_syscall (SIGUSR1): FAIL (0x100)
>
> Your next email suggested adding TIF_TASK_ISOLATION to the set of
> flags in
in the literal pool. The rest of the patch is straightforward and
reflects what is done on other architectures.
Signed-off-by: Francis Giraldeau <francis.girald...@gmail.com>
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/thread_info.h
Unwind may loop forever if sample is incomplete or bogus. Bound the number of
unw_step() that yield the same IP to prevent infinite loop.
Signed-off-by: Francis Giraldeau
---
tools/perf/util/unwind.c | 8 +++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util
in the literal pool. The rest of the patch is straightforward and
reflects what is done on other architectures.
Signed-off-by: Francis Giraldeau
---
arch/arm/Kconfig | 1 +
arch/arm/include/asm/thread_info.h | 8 ++--
arch/arm/kernel/entry
On 2016-08-29 12:27 PM, Chris Metcalf wrote:
> On 8/16/2016 5:19 PM, Chris Metcalf wrote:
>> Here is a respin of the task-isolation patch set.
>
> No concerns have been raised yet with the v15 version of the patch series
> in the two weeks since I posted it, and I think I have addressed all
>
On 2016-09-07 05:11 PM, Francis Giraldeau wrote:
> The syscall test fails on x86:
> $ sudo ./isolation
> [...]
> test_syscall: FAIL (0x100)
> test_syscall (SIGUSR1): FAIL (0x100)
>
> I wanted to debug this problem with gdb and a KVM virtual machine. However,
&
On 2016-09-07 05:11 PM, Francis Giraldeau wrote:
> The syscall test fails on x86:
> $ sudo ./isolation
> [...]
> test_syscall: FAIL (0x100)
> test_syscall (SIGUSR1): FAIL (0x100)
The fix is indeed very simple:
diff --git a/arch/x86/include/asm/thread_info.h
b/a
On 2016-09-12 12:01 PM, Chris Metcalf wrote:
> The syscall test fails on x86:
>>
>> $ sudo ./isolation
>> [...]
>> test_syscall: FAIL (0x100)
>> test_syscall (SIGUSR1): FAIL (0x100)
>
> Your next email suggested adding TIF_TASK_ISOLATION to the set of
> flags in
On 2016-09-12 08:05 PM, Rafael J. Wysocki wrote:
> On Monday, September 12, 2016 11:15:45 PM Rafael J. Wysocki wrote:
>> On Monday, September 12, 2016 06:14:44 PM Peter Zijlstra wrote:
>>> On Mon, Sep 12, 2016 at 12:01:58PM -0400, Chris Metcalf wrote:
>>>> On 9/7/2
I tested this patch on 4.7 and confirm that irq_work does not occurs anymore on
the isolated cpu. Thanks!
I don't know of any utility to test the task isolation feature, so I started
one:
https://github.com/giraldeau/taskisol
The script exp.sh runs the taskisol to test five different
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