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522dc4e5f5
The command `ps -ef ` and `top -c` mark kernel thread by '[' and ']', but sometimes the result is not correct. The task->flags in /proc/$pid/stat is good, but we need remember the value of PF_KTHREAD is 0x00200000 and convert dec to hex. If we have no binary program and shell script which read /proc/$pid/stat, we can know it directly by `cat /proc/$pid/status`. Link: https://lkml.kernel.org/r/20230416052404.2920-1-fullspring2018@gmail.com Signed-off-by: Chunguang Wu <fullspring2018@gmail.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>