linux - How one can set affinity for kernel threads? -


on linux kernel 3.11.0-13-generic can't set affinity kernel threads in following example:

>ps -p 828   pid tty          time cmd   828 ?        00:00:00 nfsiod >sudo taskset -pc 7 828 pid 828's current affinity list: 0-11 taskset: failed set pid 828's affinity: invalid argument >sudo taskset -pc 7 17551 pid 17551's current affinity list: 7 pid 17551's new affinity list: 7 >

17551 user process, , nfsiod kernel thread. how can change affinity nfsiod deamon running kernel thread ?

many kernel threads set flag pf_no_setaffinity:

#define pf_no_setaffinity 0x04000000 /* userland not allowed meddle cpus_allowed */

to change affinity, have change kernel.


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