Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Dave Chiluk <chiluk+linux@indeed.com>
To:     Ben Segall <bsegall@google.com>, Phil Auld <pauld@redhat.com>,
        Peter Oskolkov <posk@posk.io>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, cgroups@vger.kernel.org,
        linux-kernel@vger.kernel.org, Brendan Gregg <bgregg@netflix.com>,
        Kyle Anderson <kwa@yelp.com>,
        Gabriel Munos <gmunoz@netflix.com>,
        John Hammond <jhammond@indeed.com>,
        Cong Wang <xiyou.wangcong@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>, linux-doc@vger.kernel.org
Subject: [PATCH v6 0/1] sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
Date:   Tue, 23 Jul 2019 11:44:25 -0500
Message-Id: <1563900266-19734-1-git-send-email-chiluk+linux@indeed.com>
In-Reply-To: <1558121424-2914-1-git-send-email-chiluk+linux@indeed.com>
References: <1558121424-2914-1-git-send-email-chiluk+linux@indeed.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Changelog v6
- Added back missing call to lsub_positive(&cfs_b->runtime, runtime);
- Added Reviewed-by: Ben Segall <bsegall@google.com>
- Fix some grammar in the Documentation, and change some wording.
- Updated documentation due to the .rst change

Changelog v5
- Based on this comment from Ben Segall's comment on v4
> If the cost of taking this global lock across all cpus without a
> ratelimit was somehow not a problem, I'd much prefer to just set
> min_cfs_rq_runtime = 0. (Assuming it is, I definitely prefer the "lie
> and sorta have 2x period 2x runtime" solution of removing expiration)
I'm resubmitting my v3 patchset, with the requested changes.
- Updated Commit log given review comments
- Update sched-bwc.txt give my new understanding of the slack timer.

Changelog v4
- Rewrote patchset around the concept of returning all of runtime_remaining
when cfs_b nears the end of available quota.

Changelog v3
- Reworked documentation to better describe behavior of slice expiration per
feedback from Peter Oskolkov

Changelog v2
- Fixed some checkpatch errors in the commit message.