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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 0/2] Expedited grace-period changes for v4.19 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: 18062522-0072-0000-0000-0000037459DC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009255; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01052299; UDB=6.00539447; IPR=6.00830224; MB=3.00021855; MTD=3.00000008; XFM=3.00000015; UTC=2018-06-25 22:41:07 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18062522-0073-0000-0000-0000487C262A Message-Id: <20180625224308.GA10064@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-06-25_11:,, 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=747 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1806250253 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series contains a couple of changes to RCU expedited grace periods: 1. Initialize the last rcu_node structure via direct call rather than via workqueue. 2. Make parallel initialization of parallel grace periods handle the possibility of CPU 0 begin offline, courtesy of Boqun Feng. (This is currently marked Not-Yet-Signed-off-by while looking into the possibility of a more efficient implementation.) Thanx, Paul ------------------------------------------------------------------------ rcu.h | 3 +++ tree_exp.h | 21 +++++++++++++++++---- 2 files changed, 20 insertions(+), 4 deletions(-)