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+1000 From: Alistair Popple To: Arsen =?utf-8?Q?Arsenovi=C4=87?= Cc: amd-gfx@lists.freedesktop.org, linux-mm@kvack.org, cs-tech-ext@baylibre.com Subject: Re: [BUG] Frequent hangs or WARNINGs when using heterogeneous memory with an AMD MI210 GPU Message-ID: References: <86ecjz2hhr.fsf@baylibre.com> <86tssu0w8p.fsf@baylibre.com> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <86tssu0w8p.fsf@baylibre.com> X-ClientProxiedBy: SY5PR01CA0010.ausprd01.prod.outlook.com (2603:10c6:10:1fa::19) To DS0PR12MB7726.namprd12.prod.outlook.com (2603:10b6:8:130::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY8PR12MB7705:EE_|SJ0PR12MB8165:EE_ X-MS-Office365-Filtering-Correlation-Id: d4da904e-6ce7-4914-9165-08dea749ed5a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|366016|1800799024|376014|56012099003|18002099003|22082099003; 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Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" On 2026-04-29 at 22:47 +1000, Arsen Arsenovi=C4=87 wrote... > Arsen Arsenovi=C4=87 writes: >=20 > > We get this by running the following OpenMP program built for offloadin= g > > onto an AMD GPU: > > > > https://gcc.gnu.org/cgit/gcc/tree/libgomp/testsuite/libgomp.c++/pr119= 692-1-4.C > > > > ... built by: > > > > x86_64-none-linux-gnu-g++ pr119692-1-4.C -foffload=3D-march=3Dgfx90a = \ > > -Wl,-rpath,/opt/rocm/lib -fopenmp -O2 \ > > -DDEFAULT=3D'defaultmap(firstprivate)' \ > > -lm -o ./pr119692-1-4.exe > > > > ... using trunk GCC configured for amdgcn-amdhsa offloading[1] and > > executed as: > > > > timeout --verbose 10s env HSA_XNACK=3D1 LD_LIBRARY_PATH=3D. ./pr11969= 2-1-4.exe > > > > ... when the timeout happens (i.e. the program gets stuck for 10 second= s > > and then, when 10 seconds pass, timeout sends a SIGTERM to a.out, and > > results in the crash above). >=20 > I've now confirmed that it is possible to reproduce this specific issue > also on bare metal, also with kernel 7.0.2 and ROCm 7.2.2 (using the > rocm/dev-ubuntu-22.04:7.2.2 Docker image): >=20 > [ 1171.959571] ------------[ cut here ]------------ > [ 1171.959577] WARNING: mm/memory.c:1753 at unmap_page_range+0x10d5/0x1= bc0, CPU#247: pr119692-1-4.ex/143761 I don't know the AMD driver well enough to comment definitively but chances= are this warning is spurious. I have been meaning to put togeather a fix for it= . The problem is that migrate_vma_setup() etc. allow for migration of anonymo= us folios, which is subtly different from only allowing migration of anonymous VMA's. Specifically migrate_vma checks for folio_test_anon() which returns true fo= r private file-backed VMAs while the warning is based on vma_is_anonymous() which is false for such mappings. So it is possible for the driver to migra= te a private filebacked mapping to GPU memory which will trigger this warning du= ring teardown if the page wasn't migrated back. - Alistair > [ 1171.959613] Modules linked in: xt_iprange xt_LOG nf_log_syslog xt_co= mment amdgpu amdxcp drm_ttm_helper ttm drm_exec drm_panel_backlight_quirks = gpu_sched drm_suballoc_helper video drm_buddy drm_display_helper cec rc_cor= e iptable_nat iptable_filter vhost_vsock vmw_vsock_virtio_transport_common = vsock vhost vhost_iotlb nf_conntrack_netlink xt_nat veth vxlan ip6_udp_tunn= el udp_tunnel xt_policy xt_mark xt_bpf xt_tcpudp br_netfilter xt_conntrack = xt_MASQUERADE xfrm_user xfrm_algo xt_set ip_set nft_chain_nat nf_nat nf_con= ntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_addrtype nft_compat nfsv3 nfs netfs= overlay 8021q garp mrp bridge stp llc bonding tls nf_tables nfnetlink binf= mt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common amd64_edac edac_mce_= amd kvm_amd ipmi_ssif kvm irqbypass rapl wmi_bmof pcspkr ccp input_leds joy= dev mac_hid acpi_ipmi ptdma ipmi_si k10temp ipmi_devintf ipmi_msghandler nf= sd auth_rpcgss nfs_acl lockd sch_fq_codel dm_multipath grace scsi_dh_rdac s= csi_dh_emc scsi_dh_alua sunrpc msr efi_pstore ip_tables x_tables > [ 1171.959847] autofs4 btrfs libblake2b raid10 raid456 async_raid6_rec= ov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 hid_ge= neric usbmouse igb bnxt_en ghash_clmulni_intel usbhid ast rndis_host ahci c= dc_ether libahci dca usbnet hid i2c_algo_bit mii i2c_piix4 i2c_smbus wmi ae= sni_intel > [ 1171.959939] CPU: 247 UID: 0 PID: 143761 Comm: pr119692-1-4.ex Not ta= inted 7.0.2-instinct-arsen #3 PREEMPT(lazy) > [ 1171.959947] Hardware name: Supermicro AS -4124GS-TNR/H12DSG-O-CPU, B= IOS 2.8 01/26/2024 > [ 1171.959951] RIP: 0010:unmap_page_range+0x10d5/0x1bc0 > [ 1171.959959] Code: 2e 2e 2e 31 c0 4c 39 b5 50 ff ff ff 0f 85 72 f2 ff= ff e9 b1 fd ff ff 48 8b 45 90 48 8b 53 18 48 83 78 48 00 0f 84 28 f9 ff ff= <0f> 0b e9 21 f9 ff ff a9 ff 0f 00 00 0f 85 cb fb ff ff 48 8b 10 83 > [ 1171.959964] RSP: 0018:ffffce40ffc87920 EFLAGS: 00010286 > [ 1171.959969] RAX: ffff8e18cb2ee900 RBX: fffff3333ffb6a00 RCX: 0000000= 000000000 > [ 1171.959973] RDX: ffff8e18de1b18c9 RSI: 0000000000000005 RDI: 0000000= 000000000 > [ 1171.959976] RBP: ffffce40ffc87a30 R08: 0000000000000000 R09: 0000000= 000000000 > [ 1171.959979] R10: 0000000000000000 R11: 0000000000000000 R12: ffffce4= 0ffc87b90 > [ 1171.959983] R13: fffff3333ffb6a00 R14: 0000000000000001 R15: ffff8e1= 8ba912018 > [ 1171.959986] FS: 0000000000000000(0000) GS:ffff8e57ac3da000(0000) kn= lGS:0000000000000000 > [ 1171.959990] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 1171.959994] CR2: 000070d717bfe920 CR3: 0000004169a48002 CR4: 0000000= 000f70ef0 > [ 1171.960000] PKRU: 55555554 > [ 1171.960004] Call Trace: > [ 1171.960008] > [ 1171.960022] unmap_single_vma+0x96/0x110 > [ 1171.960031] unmap_vmas+0xa5/0x180 > [ 1171.960041] exit_mmap+0x13b/0x400 > [ 1171.960060] __mmput+0x45/0x170 > [ 1171.960068] mmput+0x31/0x40 > [ 1171.960074] do_exit+0x285/0xad0 > [ 1171.960083] do_group_exit+0x2d/0xb0 > [ 1171.960090] get_signal+0x86a/0x930 > [ 1171.960099] ? kfd_ioctl+0x4ad/0x5c0 [amdgpu] > [ 1171.960563] ? srso_alias_return_thunk+0x5/0xfbef5 > [ 1171.960570] ? __x64_sys_ioctl+0xbd/0x100 > [ 1171.960580] arch_do_signal_or_restart+0x3a/0x250 > [ 1171.960608] exit_to_user_mode_loop+0x8f/0x500 > [ 1171.960618] do_syscall_64+0x2cd/0x14b0 > [ 1171.960626] ? srso_alias_return_thunk+0x5/0xfbef5 > [ 1171.960631] ? handle_mm_fault+0x1e8/0x2f0 > [ 1171.960640] ? srso_alias_return_thunk+0x5/0xfbef5 > [ 1171.960646] ? do_user_addr_fault+0x2ee/0x830 > [ 1171.960655] ? srso_alias_return_thunk+0x5/0xfbef5 > [ 1171.960660] ? irqentry_exit+0xa5/0x600 > [ 1171.960670] ? srso_alias_return_thunk+0x5/0xfbef5 > [ 1171.960676] ? exc_page_fault+0x94/0x1e0 > [ 1171.960682] ? ret_from_fork+0x1b2/0x3a0 > [ 1171.960691] entry_SYSCALL_64_after_hwframe+0x76/0x7e > [ 1171.960697] RIP: 0033:0x70d718dab9cf > [ 1171.960704] Code: Unable to access opcode bytes at 0x70d718dab9a5. > [ 1171.960708] RSP: 002b:000070d717bfda90 EFLAGS: 00000246 ORIG_RAX: 00= 00000000000010 > [ 1171.960716] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 000070d= 718dab9cf > [ 1171.960720] RDX: 000070d717bfdb60 RSI: 00000000c0184b0c RDI: 0000000= 000000003 > [ 1171.960725] RBP: 00000000c0184b0c R08: 0000000040000001 R09: 000070d= 708000dd0 > [ 1171.960728] R10: 000070d71902bc68 R11: 0000000000000246 R12: 000070d= 717bfdc10 > [ 1171.960732] R13: 000070d717bfdb60 R14: 0000000031050b60 R15: 000070d= 708000dd0 > [ 1171.960741] > [ 1171.960746] ---[ end trace 0000000000000000 ]--- >=20 > I'll try the other testcase we had (omptests t-unified-* all running in > parallel) later also. > --=20 > Arsen Arsenovi=C4=87