I will learn how to use KernelShark. Try to solve my problem,thanks
for your suggestion.
Talk about I solved a problem with hung task milliseconds：
the process get anon_vma read lock when it directly reclaims
memory, but other process down anon_vma write lock,
long time waiting for write lock
On Fri, Jul 03, 2020 at 11:18:28AM +0800, yang che wrote:
> my understanding, KernelShark can't trigger panic, hung_task can
> trigger. According to my use,
> sometimes need to trigger panic to grab ramdump to analyze lock and
> memory problems.
You shouldn't need to trigger a panic to analyse
my understanding, KernelShark can't trigger panic, hung_task can
trigger. According to my use,
sometimes need to trigger panic to grab ramdump to analyze lock and
memory problems.
So I want to increase this millisecond support.
Matthew Wilcox 于2020年7月3日周五 上午1:43写道：
>
> On Thu, Jul 02, 2020 at
On Thu, Jul 02, 2020 at 10:08:13PM +0800, yang che wrote:
> current hung_task_check_interval_secs and hung_task_timeout_secs
> only supports seconds.in some cases,the TASK_UNINTERRUPTIBLE state
> takes less than 1 second.The task of the graphical interface,
> the unterruptible state lasts for
current hung_task_check_interval_secs and hung_task_timeout_secs
only supports seconds.in some cases,the TASK_UNINTERRUPTIBLE state
takes less than 1 second.The task of the graphical interface,
the unterruptible state lasts for hundreds of milliseconds
will cause the interface to freeze
echo 1 >
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