linux-kernel - [PATCH v9 0/2] Make find_later_rq() choose a closer cpu in topology

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Message-Id: <1503390615-22342-1-git-send-email-byungchul.park@lge.com>
Date:   Tue, 22 Aug 2017 17:30:13 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     peterz@...radead.org, mingo@...nel.org
Cc:     joel.opensrc@...il.com, linux-kernel@...r.kernel.org,
        juri.lelli@...il.com, rostedt@...dmis.org, kernel-team@....com
Subject: [PATCH v9 0/2] Make find_later_rq() choose a closer cpu in topology

Change from v8
   -. add suggested-by Peterz
   -. add several comments

Change from v7
   -. fix a trivial typo
   -. modify commit messages to explain what it does more clearly
   -. simplify code with an existing macro

Change from v6
   -. add a comment about selection of fallback_cpu incase more than one exist
   -. modify a comment explaining what we do wrt PREFER_SIBLING

Change from v5
   -. exclude two patches already picked up by peterz
      (sched/deadline: Make find_later_rq() choose a closer cpu in topology)
      (sched/deadline: Change return value of cpudl_find())
   -. apply what peterz fixed for 'prefer sibling', into deadline and rt

Change from v4
   -. remove a patch that might cause huge lock contention
      (by spin lock(&cpudl.lock) in a hot path of scheduler)

Change from v3
   -. rename closest_cpu to best_cpu so that it align with rt
   -. protect referring cpudl.elements with cpudl.lock
   -. change return value of cpudl_find() to bool

Change from v2
   -. add support for SD_PREFER_SIBLING

Change from v1
   -. clean up the patch

Byungchul Park (2):
  sched/deadline: Add support for SD_PREFER_SIBLING on find_later_rq()
  sched/rt: Add support for SD_PREFER_SIBLING on find_lowest_rq()

 kernel/sched/deadline.c | 80 ++++++++++++++++++++++++++++++++++++++++++++-----
 kernel/sched/rt.c       | 78 +++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 148 insertions(+), 10 deletions(-)

-- 
1.9.1