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Tue, 10 Sep 2024 14:52:33 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A397C2004D; Tue, 10 Sep 2024 14:52:33 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 715AC20043; Tue, 10 Sep 2024 14:52:33 +0000 (GMT) Received: from tuxmaker.linux.ibm.com (unknown [9.152.85.9]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 10 Sep 2024 14:52:33 +0000 (GMT) From: Sven Schnelle To: Peter Zijlstra Cc: mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, kprateek.nayak@amd.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, tglx@linutronix.de, efault@gmx.de Subject: Re: [PATCH 00/24] Complete EEVDF In-Reply-To: <20240910140739.GI4723@noisy.programming.kicks-ass.net> (Peter Zijlstra's message of "Tue, 10 Sep 2024 16:07:39 +0200") References: <20240727102732.960974693@infradead.org> <20240910140739.GI4723@noisy.programming.kicks-ass.net> Date: Tue, 10 Sep 2024 16:52:33 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-GUID: fWuxmchL7DU2wHoTA5het7EBu-3dsKmw X-Proofpoint-ORIG-GUID: e5LvltAbiSEmLv3iLuL-2dCL5UAC_NtM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-10_04,2024-09-09_02,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 clxscore=1015 malwarescore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409100108 Peter Zijlstra writes: > On Tue, Sep 10, 2024 at 02:21:05PM +0200, Sven Schnelle wrote: >> Sven Schnelle writes: >> >> > Peter Zijlstra writes: >> > >> >> Hi all, >> >> >> >> So after much delay this is hopefully the final version of the EEVDF patches. >> >> They've been sitting in my git tree for ever it seems, and people have been >> >> testing it and sending fixes. >> >> >> >> I've spend the last two days testing and fixing cfs-bandwidth, and as far >> >> as I know that was the very last issue holding it back. >> >> >> >> These patches apply on top of queue.git sched/dl-server, which I plan on merging >> >> in tip/sched/core once -rc1 drops. >> >> >> >> I'm hoping to then merge all this (+- the DVFS clock patch) right before -rc2. >> >> >> >> >> >> Aside from a ton of bug fixes -- thanks all! -- new in this version is: >> >> >> >> - split up the huge delay-dequeue patch >> >> - tested/fixed cfs-bandwidth >> >> - PLACE_REL_DEADLINE -- preserve the relative deadline when migrating >> >> - SCHED_BATCH is equivalent to RESPECT_SLICE >> >> - propagate min_slice up cgroups >> >> - CLOCK_THREAD_DVFS_ID >> > >> > I'm seeing crashes/warnings like the following on s390 with linux-next 20240909: >> > >> > Sometimes the system doesn't manage to print a oops, this one is the best i got: >> > >> > [..] >> > This happens when running the strace test suite. The system normaly has >> > 128 CPUs. With this configuration the crash doesn't happen, but when >> > disabling all but four CPUs and running 'make check -j16' in the strace >> > test suite the crash is almost always reproducable. > > I noted: Comm: prctl-sched-cor, which is testing core scheduling, right? > > Only today I;ve merged a fix for that: > > c662e2b1e8cf ("sched: Fix sched_delayed vs sched_core") > > Could you double check if merging tip/sched/core into your next tree > helps anything at all? Yes, that fixes the issue. Thanks!