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abd8ac0557
If hung_task_panic is enabled, don't consider the value of hung_task_warnings and display the information of the hung tasks. In some cases, hung_task_panic might not be initially set up, after several hung tasks occur, the hung_task_warnings count reaches zero. If hung_task_panic is set up later, it may not display any helpful hung task info in dmesg, only showing messages like: Kernel panic - not syncing: hung_task: blocked tasks CPU: 3 PID: 58 Comm: khungtaskd Not tainted 6.10.0-rc3 #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> panic+0x2f3/0x320 watchdog+0x2dd/0x510 ? __pfx_watchdog+0x10/0x10 kthread+0xe0/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2f/0x40 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Link: https://lkml.kernel.org/r/20240613033159.3446265-1-leonylgao@gmail.com Signed-off-by: Yongliang Gao <leonylgao@tencent.com> Reviewed-by: Huang Cun <cunhuang@tencent.com> Cc: Joel Granados <j.granados@samsung.com> Cc: John Siddle <jsiddle@redhat.com> Cc: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.