What is the meaning of "same CPU-group" in the Linux kernel?

Asked Aug 26 '17 at 03:28

Active Aug 26 '17 at 18:34

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What is the meaning of complete on same CPU-group? I seen two line code:

#define QUEUE_FLAG_SAME_COMP    9   /* complete on same CPU-group */
#define QUEUE_FLAG_SAME_FORCE  18   /* force complete on same CPU */

CPU-group is equal to CPU? What is difference between force complete and non-force complete?

edited Aug 26 '17 at 12:59

asked Aug 26 '17 at 03:28

illiteracy

1

Some context would help. – Scott - Слава Україні Aug 26 '17 at 03:56
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Sounds like [cgroups](https://unix.stackexchange.com/q/247209/135943). – Wildcard Aug 26 '17 at 04:27
@Wildcard On [link 499](http://elixir.free-electrons.com/linux/v4.9/source/include/linux/blkdev.h#L499) have similar code comment,so that meaning is ` CPU == CPU-groups ` ? – illiteracy Aug 26 '17 at 04:37
No idea, sorry. I'm not a kernel developer. I recommend reading up on it in a good book; I've heard good things about [Understanding the Linux Kernel](https://www.safaribooksonline.com/library/view/understanding-the-linux/0596005652/). – Wildcard Aug 26 '17 at 05:04

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