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f.fainelli@gmail.com, sudipm.mukherjee@gmail.com, srw@sladewatkins.net, rwarsow@gmx.de, conor@kernel.org, hargar@microsoft.com, broonie@kernel.org, "linux-tegra@vger.kernel.org" References: <20250121174532.991109301@linuxfoundation.org> <449456d8-4e9a-4ee3-a3e8-8675cbde4a5c@nvidia.com> Content-Language: en-US From: Ron Economos In-Reply-To: <449456d8-4e9a-4ee3-a3e8-8675cbde4a5c@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5620.bluehost.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - w6rz.net X-BWhitelist: no X-Source-IP: 73.223.253.157 X-Source-L: No X-Exim-ID: 1taWcL-0048td-26 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: c-73-223-253-157.hsd1.ca.comcast.net ([10.0.1.116]) [73.223.253.157]:38564 X-Source-Auth: re@w6rz.net X-Email-Count: 1 X-Org: HG=bhshared;ORG=bluehost; X-Source-Cap: d3NpeHJ6bmU7d3NpeHJ6bmU7Ym94NTYyMC5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfGUE/U606JTU7Q6WkNx0p6sUVlZI9Tz9GmjmCLh41Wq3IaeUpnmK4ur6pSWhkO8AkNQQ1xGBNEQKPCCIAwPIxKb7fXIow12WSQf95dmY1w5SyCOC+IsU PtM7dR3NyDeh4Z0zgI6+xj9NTtME1DXCpfdVJno4Ur4QDPlWO/exCVv7g6iZT1divLqxpSwpNU8LeCLKVsHDu8ETvd9m+Ba8ptI= On 1/21/25 23:04, Jon Hunter wrote: > Hi Greg, > > On 21/01/2025 21:46, Salvatore Bonaccorso wrote: >> Hi Greg, >> >> On Tue, Jan 21, 2025 at 06:50:48PM +0100, Greg Kroah-Hartman wrote: >>> This is the start of the stable review cycle for the 6.12.11 release. >>> There are 122 patches in this series, all will be posted as a response >>> to this one.  If anyone has any issues with these being applied, please >>> let me know. >>> >>> Responses should be made by Thu, 23 Jan 2025 17:45:02 +0000. >>> Anything received after that time might be too late. >>> >>> The whole patch series can be found in one patch at: >>>     https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.11-rc1.gz >>> >>> or in the git tree and branch at: >>>     git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git >>> linux-6.12.y >>> and the diffstat can be found below. >> >> Built and lightly tested, when booting I'm noticing the following in >> dmesg: >> >> [  +0.007932] ------------[ cut here ]------------ >> [  +0.000003] WARNING: CPU: 1 PID: 0 at kernel/sched/fair.c:5250 >> place_entity+0x127/0x130 >> [  +0.000006] Modules linked in: ahci(E) libahci(E) crc32_pclmul(E) >> xhci_hcd(E) libata(E) psmouse(E) crc32c_intel(E) > >> [  +0.000021] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: >> G            E      6.12.11-rc1+ #1 >> [  +0.000004] Tainted: [E]=UNSIGNED_MODULE >> [  +0.000002] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), >> BIOS 1.16.2-debian-1.16.2-1 04/01/2014 >> [  +0.000002] RIP: 0010:place_entity+0x127/0x130 >> [  +0.000003] Code: 01 6b 28 c6 43 52 00 5b 5d 41 5c 41 5d 41 5e e9 >> 2f 83 bc 00 b9 02 00 00 00 49 c1 ee 0a 49 39 ce 4> >> [  +0.000002] RSP: 0018:ffffbe1f400f8d08 EFLAGS: 00010046 >> [  +0.000003] RAX: 0000000000000000 RBX: ffff9ed7c0c0f200 RCX: >> 00000000000000c2 >> [  +0.000002] RDX: 0000000000000000 RSI: 000000000000001d RDI: >> 000000000078cfd5 >> [  +0.000002] RBP: 0000000029d40d60 R08: 00000000a8e83f00 R09: >> 0000000000000002 >> [  +0.000002] R10: 00000000006e3ab2 R11: ffff9ed7d4056690 R12: >> ffff9ed83bd360c0 >> [  +0.000002] R13: 0000000000000000 R14: 00000000000000c2 R15: >> 000000000016e360 >> [  +0.000003] FS:  0000000000000000(0000) GS:ffff9ed83bd00000(0000) >> knlGS:0000000000000000 >> [  +0.000002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [  +0.000002] CR2: 00007f9f5a7245d8 CR3: 0000000100bfc000 CR4: >> 0000000000350ef0 >> [  +0.000003] Call Trace: >> [  +0.000003]  >> [  +0.000002]  ? place_entity+0x127/0x130 >> [  +0.000002]  ? __warn.cold+0x93/0xf6 >> [  +0.000004]  ? place_entity+0x127/0x130 >> [  +0.000003]  ? report_bug+0xff/0x140 >> [  +0.000005]  ? handle_bug+0x58/0x90 >> [  +0.000002]  ? exc_invalid_op+0x17/0x70 >> [  +0.000003]  ? asm_exc_invalid_op+0x1a/0x20 >> [  +0.000006]  ? place_entity+0x127/0x130 >> [  +0.000003]  ? place_entity+0x99/0x130 >> [  +0.000004]  reweight_entity+0x1af/0x1d0 >> [  +0.000003]  enqueue_task_fair+0x30c/0x5e0 >> [  +0.000005]  enqueue_task+0x35/0x150 >> [  +0.000004]  activate_task+0x3a/0x60 >> [  +0.000003]  sched_balance_rq+0x7c6/0xee0 >> [  +0.000008]  sched_balance_domains+0x25b/0x350 >> [  +0.000005]  handle_softirqs+0xcf/0x280 >> [  +0.000006]  __irq_exit_rcu+0x8d/0xb0 >> [  +0.000003]  sysvec_apic_timer_interrupt+0x71/0x90 >> [  +0.000003]  >> [  +0.000002]  >> [  +0.000002]  asm_sysvec_apic_timer_interrupt+0x1a/0x20 >> [  +0.000002] RIP: 0010:pv_native_safe_halt+0xf/0x20 >> [  +0.000004] Code: 22 d7 e9 b4 01 01 00 0f 1f 40 00 90 90 90 90 90 >> 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 0> >> [  +0.000002] RSP: 0018:ffffbe1f400bbed8 EFLAGS: 00000202 >> [  +0.000003] RAX: 0000000000000001 RBX: ffff9ed7c033e600 RCX: >> ffff9ed7c0647830 >> [  +0.000001] RDX: 0000000000000000 RSI: 0000000000000001 RDI: >> 00000000000017b4 >> [  +0.000002] RBP: 0000000000000001 R08: 0000000000000001 R09: >> 0000000000000000 >> [  +0.000002] R10: 0000000000000001 R11: 0000000000000000 R12: >> 0000000000000000 >> [  +0.000001] R13: 0000000000000000 R14: 0000000000000000 R15: >> 0000000000000000 >> [  +0.000006]  default_idle+0x9/0x20 >> [  +0.000003]  default_idle_call+0x29/0x100 >> [  +0.000002]  do_idle+0x1fe/0x240 >> [  +0.000005]  cpu_startup_entry+0x29/0x30 >> [  +0.000003]  start_secondary+0x11e/0x140 >> [  +0.000004]  common_startup_64+0x13e/0x141 >> [  +0.000007]  >> [  +0.000001] ---[ end trace 0000000000000000 ]--- >> >> Not yet bisected which change causes it. > > > I am seeing the same on Tegra. I have not looked to see which change > this is yet either. > > Jon > Seeing this on RISC-V also. Jan 21 23:51:10 riscv64 kernel: WARNING: CPU: 3 PID: 16 at kernel/sched/fair.c:5250 place_entity+0x108/0x110 Jan 21 23:51:10 riscv64 kernel: Modules linked in: Jan 21 23:51:10 riscv64 kernel: CPU: 3 UID: 0 PID: 16 Comm: rcu_preempt Not tainted 6.12.11-rc1 #2 Jan 21 23:51:10 riscv64 kernel: Hardware name: SiFive HiFive Unmatched A00 (DT) Jan 21 23:51:10 riscv64 kernel: epc : place_entity+0x108/0x110 Jan 21 23:51:10 riscv64 kernel:  ra : place_entity+0x9c/0x110 Jan 21 23:51:10 riscv64 kernel: epc : ffffffff8006ed68 ra : ffffffff8006ecfc sp : ffffffc60009bac0 Jan 21 23:51:10 riscv64 kernel:  gp : ffffffff81fa6318 tp : ffffffd680323b00 t0 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel:  t1 : 0000000000000000 t2 : 0000000000000000 s0 : ffffffc60009bb00 Jan 21 23:51:10 riscv64 kernel:  s1 : ffffffd6809f5000 a0 : 000000000053b491 a1 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel:  a2 : 0000000000000002 a3 : 0000000000000000 a4 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel:  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel:  s2 : 0000000031acb37b s3 : 0000000000000000 s4 : 000000000006920d Jan 21 23:51:10 riscv64 kernel:  s5 : ffffffd9fedb2a00 s6 : ffffffd9fedb2900 s7 : ffffffd6829cbb00 Jan 21 23:51:10 riscv64 kernel:  s8 : 0000000000000000 s9 : 0000000000000001 s10: 0000000000000201 Jan 21 23:51:10 riscv64 kernel:  s11: 0000000000000000 t3 : 0000000000000000 t4 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel:  t5 : 0000000000000000 t6 : 0000000000000000 Jan 21 23:51:10 riscv64 kernel: status: 0000000200000100 badaddr: 0000000000000002 cause: 0000000000000003 Jan 21 23:51:10 riscv64 kernel: [] place_entity+0x108/0x110 Jan 21 23:51:10 riscv64 kernel: [] reweight_entity+0x182/0x1b0 Jan 21 23:51:10 riscv64 kernel: [] update_cfs_group+0x78/0xa8 Jan 21 23:51:10 riscv64 kernel: [] dequeue_entities+0x114/0x3d8 Jan 21 23:51:10 riscv64 kernel: [] pick_task_fair+0xb4/0x110 Jan 21 23:51:10 riscv64 kernel: [] pick_next_task_fair+0x1c/0x2f0 Jan 21 23:51:10 riscv64 kernel: [] __schedule+0x176/0xc20 Jan 21 23:51:10 riscv64 kernel: [] schedule+0x22/0x148 Jan 21 23:51:10 riscv64 kernel: [] schedule_timeout+0x82/0x178 Jan 21 23:51:10 riscv64 kernel: [] rcu_gp_fqs_loop+0x346/0x4e8 Jan 21 23:51:10 riscv64 kernel: [] rcu_gp_kthread+0x12a/0x150 Jan 21 23:51:10 riscv64 kernel: [] kthread+0xc8/0xe8 Jan 21 23:51:10 riscv64 kernel: [] ret_from_fork+0xe/0x18 Jan 21 23:51:10 riscv64 kernel: ---[ end trace 0000000000000000 ]--- Reverting commit 11d21f2ae4a254aeef84fcf7b6314f5dd045151f "sched/fair: Fix EEVDF entity placement bug causing scheduling lag" removes the warning.