Messages in this thread | | | From | "Hua Zhong" <> | Subject | RE: Which process is associated with process ID 0 (swapper) | Date | Thu, 20 Apr 2006 15:15:15 -0700 |
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> >Linux really has swapper process ;) > > > To be precise, it has more than one. > > When you hit an OOPS, the trace [1] might show: > "Pid: 0, comm: swapper Not tainted 2.6.11.6" > > Plus you see one of these per CPU [ps aufwwx]: > root 106 0.0 0.0 0 0 ? S Apr20 > 0:04 [kswapd0] > > So, a question to the public: what swapper swaps, and what's > swapper(as in pid 0) in oops, if there's no PID 0?
Swapper is the idle process, which swaps nothing. Its name is historic and it doesn't appear in /proc because for_each_process() skips it.
Kswapd is totally different.
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