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d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8417611C052; Tue, 22 Jun 2021 07:39:25 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8B42211C054; Tue, 22 Jun 2021 07:39:24 +0000 (GMT) Received: from smtpclient.apple (unknown [9.85.86.62]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 22 Jun 2021 07:39:24 +0000 (GMT) From: Sachin Sant Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.100.0.2.22\)) Subject: [powerpc][next-20210621] WARNING at kernel/sched/fair.c:3277 during boot Message-Id: <2ED1BDF5-BC0C-47CD-8F33-9A46C738F8CF@linux.vnet.ibm.com> Date: Tue, 22 Jun 2021 13:09:23 +0530 To: open list , linux-next@vger.kernel.org X-Mailer: Apple Mail (2.3654.100.0.2.22) X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 10l99-e5z4-sKwoUIQuEsdcHfNcJ0eg8 X-Proofpoint-GUID: 10l99-e5z4-sKwoUIQuEsdcHfNcJ0eg8 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-06-22_04:2021-06-21, 2021-06-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 malwarescore=0 impostorscore=0 mlxscore=0 clxscore=1015 spamscore=0 mlxlogscore=978 phishscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106220046 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vincent Guittot , linuxppc-dev@lists.ozlabs.org, Odin Ugedal Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" While booting 5.13.0-rc7-next-20210621 on a PowerVM LPAR following = warning is seen [ 30.922154] ------------[ cut here ]------------ [ 30.922201] cfs_rq->avg.load_avg || cfs_rq->avg.util_avg || = cfs_rq->avg.runnable_avg [ 30.922219] WARNING: CPU: 6 PID: 762 at kernel/sched/fair.c:3277 = update_blocked_averages+0x758/0x780 [ 30.922259] Modules linked in: pseries_rng xts vmx_crypto = uio_pdrv_genirq uio sch_fq_codel ip_tables sd_mod t10_pi sg fuse [ 30.922309] CPU: 6 PID: 762 Comm: augenrules Not tainted = 5.13.0-rc7-next-20210621 #1 [ 30.922329] NIP: c0000000001b27e8 LR: c0000000001b27e4 CTR: = c0000000007cfda0 [ 30.922344] REGS: c000000023fcb660 TRAP: 0700 Not tainted = (5.13.0-rc7-next-20210621) [ 30.922359] MSR: 8000000000029033 CR: = 48488224 XER: 00000005 [ 30.922394] CFAR: c00000000014d120 IRQMASK: 1=20 GPR00: c0000000001b27e4 c000000023fcb900 c000000002a08400 = 0000000000000048=20 GPR04: 00000000ffff7fff c000000023fcb5c0 0000000000000027 = c000000f6fdd7e18=20 GPR08: 0000000000000023 0000000000000001 0000000000000027 = c0000000028a6650=20 GPR12: 0000000000008000 c000000f6fff7680 c000000f6fe62600 = 0000000000000032=20 GPR16: 00000007331a989a c000000f6fe62600 c0000000238a6800 = 0000000000000001=20 GPR20: 0000000000000000 c000000002a4dfe0 0000000000000000 = 0000000000000006=20 GPR24: 0000000000000000 c000000f6fe63010 0000000000000001 = c000000f6fe62680=20 GPR28: 0000000000000006 c0000000238a69c0 0000000000000000 = c000000f6fe62600=20 [ 30.922569] NIP [c0000000001b27e8] = update_blocked_averages+0x758/0x780 [ 30.922599] LR [c0000000001b27e4] update_blocked_averages+0x754/0x780 [ 30.922624] Call Trace: [ 30.922631] [c000000023fcb900] [c0000000001b27e4] = update_blocked_averages+0x754/0x780 (unreliable) [ 30.922653] [c000000023fcba20] [c0000000001bd668] = newidle_balance+0x258/0x5c0 [ 30.922674] [c000000023fcbab0] [c0000000001bdaac] = pick_next_task_fair+0x7c/0x4d0 [ 30.922692] [c000000023fcbb10] [c000000000dcd31c] = __schedule+0x15c/0x1780 [ 30.922708] [c000000023fcbc50] [c0000000001a5a04] = do_task_dead+0x64/0x70 [ 30.922726] [c000000023fcbc80] [c000000000156338] do_exit+0x848/0xcc0 [ 30.922743] [c000000023fcbd50] [c000000000156884] = do_group_exit+0x64/0xe0 [ 30.922758] [c000000023fcbd90] [c000000000156924] = sys_exit_group+0x24/0x30 [ 30.922774] [c000000023fcbdb0] [c0000000000310c0] = system_call_exception+0x150/0x2d0 [ 30.922792] [c000000023fcbe10] [c00000000000cc5c] = system_call_common+0xec/0x278 [ 30.922808] --- interrupt: c00 at 0x7fffb3acddcc [ 30.922821] NIP: 00007fffb3acddcc LR: 00007fffb3a27f04 CTR: = 0000000000000000 [ 30.922833] REGS: c000000023fcbe80 TRAP: 0c00 Not tainted = (5.13.0-rc7-next-20210621) [ 30.922847] MSR: 800000000280f033 = CR: 28444202 XER: 00000000 [ 30.922882] IRQMASK: 0=20 GPR00: 00000000000000ea 00007fffc8f21780 00007fffb3bf7100 = 0000000000000000=20 GPR04: 0000000000000000 0000000155f142f0 0000000000000000 = 00007fffb3d23740=20 GPR08: fffffffffbad2a87 0000000000000000 0000000000000000 = 0000000000000000=20 GPR12: 0000000000000000 00007fffb3d2aeb0 0000000116be95e0 = 0000000000000032=20 GPR16: 0000000000000000 00007fffc8f21cd8 000000000000002d = 0000000000000024=20 GPR20: 00007fffc8f21cd4 00007fffb3bf4f98 0000000000000001 = 0000000000000001=20 GPR24: 00007fffb3bf0950 0000000000000000 0000000000000000 = 0000000000000001=20 GPR28: 0000000000000000 0000000000000000 00007fffb3d23ec0 = 0000000000000000=20 [ 30.923023] NIP [00007fffb3acddcc] 0x7fffb3acddcc [ 30.923035] LR [00007fffb3a27f04] 0x7fffb3a27f04 [ 30.923045] --- interrupt: c00 [ 30.923052] Instruction dump: [ 30.923061] 3863be48 9be97ae6 4bf9a8f9 60000000 0fe00000 4bfff980 = e9210070 e8610088=20 [ 30.923088] 39400001 99490003 4bf9a8d9 60000000 <0fe00000> 4bfffc24 = 3d22fff5 89297ae3=20 [ 30.923113] ---[ end trace ed07974d2149c499 ]=E2=80=94 This warning was introduced with commit 9e077b52d86a sched/pelt: Check that *_avg are null when *_sum are next-20210618 was good. Thanks -Sachin=