Re: [CFS Bandwidth Control v4 2/7] sched: accumulate per-cfs_rqcpu usage

[Balbir Singh]

* Paul Turner <pjt@xxxxxxxxxx> [2011-02-15 19:18:33]:

> Introduce account_cfs_rq_quota() to account bandwidth usage on the cfs_rq
> level versus task_groups for which bandwidth has been assigned.  This is
> tracked by whether the local cfs_rq->quota_assigned is finite or infinite
> (RUNTIME_INF).
> 
> For cfs_rq's that belong to a bandwidth constrained task_group we introduce
> tg_request_cfs_quota() which attempts to allocate quota from the global pool
> for use locally.  Updates involving the global pool are currently protected
> under cfs_bandwidth->lock, local pools are protected by rq->lock.
> 
> This patch only attempts to assign and track quota, no action is taken in the
> case that cfs_rq->quota_used exceeds cfs_rq->quota_assigned.
> 
> Signed-off-by: Paul Turner <pjt@xxxxxxxxxx>
> Signed-off-by: Nikhil Rao <ncrao@xxxxxxxxxx>
> Signed-off-by: Bharata B Rao <bharata@xxxxxxxxxxxxxxxxxx>
> ---


Acked-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
 

-- 
	Three Cheers,
	Balbir
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