Messages in this thread | | | From | Justin TerAvest <> | Date | Mon, 28 Feb 2011 16:19:43 -0800 | Subject | RFC: default group_isolation to 1, remove option |
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Hi Vivek,
I'd like to propose removing the group_isolation setting and changing the default to 1. Do we know if anyone is using group_isolation=0 to get easy group separation between sequential readers and random readers?
Allowing group_isolation complicates implementing per-cgroup request descriptor pools when a queue is moved to the root group. Specifically, if we have pools per-cgroup, we would be forced to use request descriptors from the pool for the "original" cgroup, while the requests are actually being serviced by the root cgroup.
That might be acceptable, but I figured this would be a good opportunity to revisit keeping queues within their original groups.
I know this discussion has come up before. I'm curious if we have a good reason to keep it around right now. I'd be happy to do some investigation to help make my case.
Thanks, Justin
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