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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.opensrc@gmail.com Subject: Re: [PATCH tip/core/rcu 16/22] EXP: rcu: Add debugging info to assertion Reply-To: paulmck@linux.vnet.ibm.com References: <20180423023150.GA21533@linux.vnet.ibm.com> <1524450747-22778-16-git-send-email-paulmck@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1524450747-22778-16-git-send-email-paulmck@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 18050318-0040-0000-0000-0000042610A5 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008963; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000258; SDB=6.01027002; UDB=6.00524569; IPR=6.00806135; MB=3.00020910; MTD=3.00000008; XFM=3.00000015; UTC=2018-05-03 18:22:26 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050318-0041-0000-0000-0000082C1947 Message-Id: <20180503182344.GB1981@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-03_08:,, 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 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805030157 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 22, 2018 at 07:32:21PM -0700, Paul E. McKenney wrote: > The WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp()) in > rcu_gp_cleanup() triggers (inexplicably, of course) every so often. > This commit therefore extracts more information. > > Signed-off-by: Paul E. McKenney This commit and the remaining ones in this series are deferred from the next merge window to the one following, where modified versions are actually able to find a problem. Thanx, Paul