linux-kernel - [PATCH v4 2/2] sched/deadline: Update GRUB description in the documentation

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Date:   Fri, 26 May 2023 12:10:45 -0400
From:   Vineeth Pillai <vineeth@...byteword.org>
To:     luca.abeni@...tannapisa.it, Juri Lelli <juri.lelli@...hat.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        youssefesmat@...gle.com,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Valentin Schneider <vschneid@...hat.com>
Cc:     Vineeth Pillai <vineeth@...byteword.org>,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: [PATCH v4 2/2] sched/deadline: Update GRUB description in the documentation

Update the details of GRUB to reflect the updated logic.

Signed-off-by: Vineeth Pillai (Google) <vineeth@...byteword.org>
---
 Documentation/scheduler/sched-deadline.rst | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/scheduler/sched-deadline.rst b/Documentation/scheduler/sched-deadline.rst
index 9d9be52f221a..d9f9f10c2191 100644
--- a/Documentation/scheduler/sched-deadline.rst
+++ b/Documentation/scheduler/sched-deadline.rst
@@ -203,12 +203,15 @@ Deadline Task Scheduling
   - Total bandwidth (this_bw): this is the sum of all tasks "belonging" to the
     runqueue, including the tasks in Inactive state.
 
+  - Maximum usable bandwidth (max_bw): This is the maximum bandwidth usable by
+    deadline tasks and is currently set to the RT capacity.
+
 
  The algorithm reclaims the bandwidth of the tasks in Inactive state.
  It does so by decrementing the runtime of the executing task Ti at a pace equal
  to
 
-           dq = -max{ Ui / Umax, (1 - Uinact - Uextra) } dt
+           dq = -(max{ Ui, (Umax - Uinact - Uextra) } / Umax) dt
 
  where:
 
-- 
2.40.1