From: Tejun Heo <tj@kernel.org>
To: Tao Cui <cui.tao@linux.dev>
Cc: arighi@nvidia.com, void@manifault.com, changwoo@igalia.com,
michalblk@google.com, liwanwu@kylinos.cn,
sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org,
bpf@vger.kernel.org, Tao Cui <cuitao@kylinos.cn>
Subject: Re: [PATCH v2 1/2] sched_ext: document the rolling-cursor requirement for dsq_vtime
Date: Tue, 01 Sep 2026 09:59:57 -1000 [thread overview]
Message-ID: <0cbe2f233f77f013361d4593a88bac38@kernel.org> (raw)
In-Reply-To: <20260901140343.764080-2-cui.tao@linux.dev>
Hello,
On Tue, Sep 01, 2026 at 10:03:42PM +0800, Tao Cui wrote:
...
> + * should stay within half the u64 range (2^63) of each other so that
> + * time_before64() ordering remains well-defined.
Two values exactly 2^63 apart are before each other in both directions, so
"less than 2^63 apart". Also, please fold this into the paragraph above.
Thanks.
--
tejun
next prev parent reply other threads:[~2026-09-01 19:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 14:03 [PATCH v2 0/2] sched_ext: document and enforce vtime ordering constraints Tao Cui
2026-09-01 14:03 ` [PATCH v2 1/2] sched_ext: document the rolling-cursor requirement for dsq_vtime Tao Cui
2026-09-01 19:59 ` Tejun Heo [this message]
2026-09-01 14:03 ` [PATCH v2 2/2] sched_ext/scx_flatcg: make cgv_node_less() wraparound-safe Tao Cui
2026-09-01 14:19 ` sashiko-bot
2026-09-01 20:00 ` Tejun Heo
2026-09-02 1:21 ` Tao Cui
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