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McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org Subject: [PATCH tip/core/rcu 0/10] Dyntick changes for v4.20/v5.0 Reply-To: paulmck@linux.vnet.ibm.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 18082923-0072-0000-0000-000003996A83 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009636; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01080754; UDB=6.00557503; IPR=6.00860739; MB=3.00023002; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-29 23:07:20 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18082923-0073-0000-0000-0000493EC1B5 Message-Id: <20180829230715.GA9431@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-29_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=608 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808290225 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! Now that there is only one rcu_data structure per CPU, there isn't a whole lot of point in maintaining a separate per-CPU rcu_dynticks structure. This series therefore merges the rcu_dynticks structure into the rcu_data structure. 1. Remove unused rcu_dynticks_snap() from Tiny RCU. 2. Merge rcu_dynticks structure into rcu_data structure, but continue using the rcu_dynticks structure's fields. 3-8. Change the code to use the fields in the rcu_data structure instead of those in the rcu_dynticks structure. 9. Remove the now-obsolete ->dynticks_fqs and ->cond_resched_completed fields from the rcu_data structure. 10. Convert rcu_state.ofl_lock to raw_spinlock_t to make -rt feel better, courtesy of Mike Galbraith. Thanx, Paul ------------------------------------------------------------------------ include/linux/rcutiny.h | 6 - kernel/rcu/tree.c | 196 ++++++++++++++++++++++------------------------- kernel/rcu/tree.h | 82 +++++++------------ kernel/rcu/tree_exp.h | 8 - kernel/rcu/tree_plugin.h | 69 +++++++--------- 5 files changed, 163 insertions(+), 198 deletions(-)