In Linux, a kernel thread have a PID:
Why is that? Is a kernel thread considered to be a process? And does a "normal" thread also have a PID?
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opensourceforu.com/2011/08/… should helpMunir– Munir2017-06-20 00:56:10 +00:00Commented Jun 20, 2017 at 0:56
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See also unix.stackexchange.com/questions/31595/…Anthony Geoghegan– Anthony Geoghegan2017-06-20 09:09:29 +00:00Commented Jun 20, 2017 at 9:09
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1 Answer
They are poorly named. Kernel threads in linux are processes (not actual threads) that run in kernel space rather than user space.
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A process have many threads, does a kernel thread have many threads also?paul– paul2017-06-20 02:55:48 +00:00Commented Jun 20, 2017 at 2:55
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@paul Related: stackoverflow.com/q/34959506/49414952017-06-20 06:09:25 +00:00Commented Jun 20, 2017 at 6:09
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1Kernel threads do not run in their own address space. Since the usual definition of a thread (vs. a process) is that related threads are executed in a shared address space, I think thread is a more appropriate term than process here.Johan Myréen– Johan Myréen2017-06-20 07:08:20 +00:00Commented Jun 20, 2017 at 7:08
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@Johan Myréen A kernel thread has a PID as I have shown, but does a "normal" thread also have a PID?paul– paul2017-06-20 18:19:23 +00:00Commented Jun 20, 2017 at 18:19
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@paul - "Normal" thread too has a PID, which is inherited from the creator process/thread (the one that called pthread_create() to launch it).FooF– FooF2020-04-27 08:29:42 +00:00Commented Apr 27, 2020 at 8:29