Greetings! Got this after a while on my Pentium 4 box, building GCC 12 via distcc. System was under heavy load with up to 1 GiB swap consumed at times: [...] BUG: unable to handle page fault for address: 000020e8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page *pde = 00000000 Oops: 0000 [#1] SMP CPU: 1 PID: 21109 Comm: ld Not tainted 6.4.0-rc1-P3 #1 Hardware name: /FS51, BIOS 6.00 PG 12/02/2003 EIP: obj_cgroup_uncharge_pages+0x8/0x80 Code: c9 31 d2 c3 4b eb c6 8b 46 04 f0 83 28 01 75 ea 8b 4e 04 8b 49 04 89 f0 e8 11 74 58 00 eb db 90 90 90 55 89 e5 53 57 56 89 d7 <8b> 71 08 f6 46 2c 01 75 20 8b 46 08 a8 03 74 16 8b 56 0c 8b 02 85 EAX: 00000001 EBX: e3ecb6a6 ECX: 000020e0 EDX: 00000001 ESI: 000020e0 EDI: 00000001 EBP: e3ecb5f3 ESP: e3ecb5e7 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010202 CR0: 80050033 CR2: 000020e8 CR3: 179f9000 CR4: 000006d0 Call Trace: __memcg_kmem_uncharge_page+0x2c/0x64 free_unref_page_prepare+0x54/0x1f4 free_unref_page_list+0x36/0x194 shrink_folio_list+0xa64/0xa9c evict_folios+0xbd7/0xe54 try_to_shrink_lruvec+0x1c5/0x250 shrink_one+0xad/0x17c shrink_node+0x7ae/0x910 do_try_to_free_pages+0x194/0x408 try_to_free_pages+0x257/0x324 ? wake_all_kswapds+0x4d/0xa0 __alloc_pages_slowpath+0x3bf/0x93c ? free_iova_fast+0xe7/0x144 __alloc_pages+0x178/0x1e4 __folio_alloc+0x14/0x34 __read_swap_cache_async+0xac/0x1f0 swap_cluster_readahead+0x15c/0x1b4 swapin_readahead+0x28/0x310 ? xas_load+0x36/0x4c ? filemap_get_entry+0x2f/0xc4 ? __filemap_get_folio+0x1b/0x1e8 ? page_add_anon_rmap+0x8a/0x14c ? swap_cache_get_folio+0x35/0xe0 do_swap_page+0x14e/0x75c handle_mm_fault+0x596/0xd70 exc_page_fault+0x215/0x378 ? doublefault_shim+0x100/0x100 handle_exception+0x101/0x101 EIP: fault_in_readable+0x5e/0x94 Code: ff 0f 00 00 89 f1 81 e1 00 f0 ff ff eb 08 8d b0 ff 0f 00 00 89 c1 01 d6 81 e6 00 f0 ff ff 39 c6 72 3a 39 f1 74 15 89 cf 89 f9 <8a> 1f 89 f1 88 5d f3 81 c7 00 10 00 00 39 f7 75 ed 8d 76 00 8a 5d EAX: a59797d0 EBX: 0e0cee00 ECX: a5984000 EDX: 0000e000 ESI: a5988000 EDI: a5984000 EBP: e3ecbcd0 ESP: e3ecbcc3 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010287 ? doublefault_shim+0x100/0x100 ? doublefault_shim+0x100/0x100 ? fault_in_readable+0x5e/0x94 Modules linked in: nfsv4 nfs lockd grace sunrpc ghash_generic gf128mul gcm ccm algif_aead des_generic libdes ctr cbc ecb algif_skcipher aes_generic libaes cmac sha512_generic sha1_generic md5 md4 input_leds radeon hid_generic usbhid rt2500pci eeprom_93cx6 hid rt2x00mmio rt2x00pci rt2x00lib snd_intel8x0 drm_suballoc_helper hwmon snd_ac97_codec drm_ttm_helper led_class ttm ac97_bus evdev mac80211 i2c_algo_bit snd_pcm ohci_pci ohci_hcd drm_display_helper ehci_pci ehci_hcd snd_timer snd video libarc4 wmi usbcore soundcore backlight firewire_ohci usb_common firewire_core cfg80211 crc_itu_t rfkill fan thermal button pkcs8_key_parser loop dm_mod configfs dmi_sysfs CR2: 00000000000020e8 ---[ end trace 0000000000000000 ]--- EIP: obj_cgroup_uncharge_pages+0x8/0x80 Code: c9 31 d2 c3 4b eb c6 8b 46 04 f0 83 28 01 75 ea 8b 4e 04 8b 49 04 89 f0 e8 11 74 58 00 eb db 90 90 90 55 89 e5 53 57 56 89 d7 <8b> 71 08 f6 46 2c 01 75 20 8b 46 08 a8 03 74 16 8b 56 0c 8b 02 85 EAX: 00000001 EBX: e3ecb6a6 ECX: 000020e0 EDX: 00000001 ESI: 000020e0 EDI: 00000001 EBP: e3ecb5f3 ESP: e3ecb5e7 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010202 CR0: 80050033 CR2: 000020e8 CR3: 179f9000 CR4: 000006d0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 21109 at kernel/exit.c:815 do_exit+0x60c/0x744 Modules linked in: nfsv4 nfs lockd grace sunrpc ghash_generic gf128mul gcm ccm algif_aead des_generic libdes ctr cbc ecb algif_skcipher aes_generic libaes cmac sha512_generic sha1_generic md5 md4 input_leds radeon hid_generic usbhid rt2500pci eeprom_93cx6 hid rt2x00mmio rt2x00pci rt2x00lib snd_intel8x0 drm_suballoc_helper hwmon snd_ac97_codec drm_ttm_helper led_class ttm ac97_bus evdev mac80211 i2c_algo_bit snd_pcm ohci_pci ohci_hcd drm_display_helper ehci_pci ehci_hcd snd_timer snd video libarc4 wmi usbcore soundcore backlight firewire_ohci usb_common firewire_core cfg80211 crc_itu_t rfkill fan thermal button pkcs8_key_parser loop dm_mod configfs dmi_sysfs CPU: 1 PID: 21109 Comm: ld Tainted: G D 6.4.0-rc1-P3 #1 Hardware name: /FS51, BIOS 6.00 PG 12/02/2003 EIP: do_exit+0x60c/0x744 Code: ff 8b 86 10 06 00 00 85 c0 74 07 64 01 05 78 ba 49 d7 e8 53 b8 04 00 e8 ce 4f 04 00 e8 45 d9 01 00 0f 0b 0f 0b e9 20 fa ff ff <0f> 0b e9 5f fa ff ff b8 05 06 00 00 8b 55 e8 e8 4c 81 00 00 e9 d5 EAX: 00000000 EBX: e4ce4280 ECX: 00000000 EDX: 00000000 ESI: c2c6c080 EDI: c5173f40 EBP: e3ecbf98 ESP: e3ecbf68 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010286 CR0: 80050033 CR2: 000020e8 CR3: 179f9000 CR4: 000006d0 Call Trace: ? switch_fpu_return+0x45/0x68 make_task_dead+0x74/0x114 rewind_stack_and_make_dead+0x11/0x14 EIP: 0xb7ee0539 Code: 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 0f 1f 00 58 b8 77 00 00 00 cd 80 90 0f 1f EAX: ffffffda EBX: 00000004 ECX: a58b6010 EDX: 00257000 ESI: b7d1dff4 EDI: a58b6010 EBP: 013214d0 ESP: bfee4ff0 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246 ? asm_exc_nmi+0xb0/0x10d ---[ end trace 0000000000000000 ]--- BUG: unable to handle page fault for address: fd676004 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page *pde = 00000000 Oops: 0002 [#2] SMP CPU: 0 PID: 21109 Comm: ld Tainted: G D W 6.4.0-rc1-P3 #1 Hardware name: /FS51, BIOS 6.00 PG 12/02/2003 EIP: __blk_flush_plug+0x3c/0xc0 Code: 40 10 39 d8 74 78 89 75 ec 8d 75 e4 89 36 89 76 04 8b 03 39 d8 74 64 0f b6 7d f0 89 5d e0 8b 03 39 d8 74 47 8b 55 ec 8b 4a 14 <89> 70 04 89 45 e4 89 31 89 4d e8 89 5a 10 89 5a 14 eb 2e 89 d8 e8 EAX: fd676000 EBX: e3ecbab3 ECX: ecbae0f5 EDX: e3ecbaa3 ESI: e3ecbe20 EDI: 00000001 EBP: e3ecbe3c ESP: e3ecbe1c DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010216 CR0: 80050033 CR2: fd676004 CR3: 04ca9000 CR4: 000006d0 Call Trace: schedule+0x3e/0x74 schedule_preempt_disabled+0x8/0xc rwsem_down_write_slowpath+0x2f8/0x40c down_write+0x2d/0x38 exit_mmap+0xb1/0x17c __mmput+0x26/0xd4 mmput+0x18/0x20 exit_mm+0x80/0x9c do_exit+0x20e/0x744 ? switch_fpu_return+0x45/0x68 make_task_dead+0x74/0x114 rewind_stack_and_make_dead+0x11/0x14 EIP: 0xb7ee0539 Code: Unable to access opcode bytes at 0xb7ee050f. EAX: ffffffda EBX: 00000004 ECX: a58b6010 EDX: 00257000 ESI: b7d1dff4 EDI: a58b6010 EBP: 013214d0 ESP: bfee4ff0 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000246 ? asm_exc_nmi+0xb0/0x10d Modules linked in: nfsv4 nfs lockd grace sunrpc ghash_generic gf128mul gcm ccm algif_aead des_generic libdes ctr cbc ecb algif_skcipher aes_generic libaes cmac sha512_generic sha1_generic md5 md4 input_leds radeon hid_generic usbhid rt2500pci eeprom_93cx6 hid rt2x00mmio rt2x00pci rt2x00lib snd_intel8x0 drm_suballoc_helper hwmon snd_ac97_codec drm_ttm_helper led_class ttm ac97_bus evdev mac80211 i2c_algo_bit snd_pcm ohci_pci ohci_hcd drm_display_helper ehci_pci ehci_hcd snd_timer snd video libarc4 wmi usbcore soundcore backlight firewire_ohci usb_common firewire_core cfg80211 crc_itu_t rfkill fan thermal button pkcs8_key_parser loop dm_mod configfs dmi_sysfs CR2: 00000000fd676004 ---[ end trace 0000000000000000 ]--- EIP: obj_cgroup_uncharge_pages+0x8/0x80 Code: c9 31 d2 c3 4b eb c6 8b 46 04 f0 83 28 01 75 ea 8b 4e 04 8b 49 04 89 f0 e8 11 74 58 00 eb db 90 90 90 55 89 e5 53 57 56 89 d7 <8b> 71 08 f6 46 2c 01 75 20 8b 46 08 a8 03 74 16 8b 56 0c 8b 02 85 EAX: 00000001 EBX: e3ecb6a6 ECX: 000020e0 EDX: 00000001 ESI: 000020e0 EDI: 00000001 EBP: e3ecb5f3 ESP: e3ecb5e7 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 CR0: 80050033 CR2: fd676004 CR3: 04ca9000 CR4: 000006d0 note: ld[21109] exited with irqs disabled Fixing recursive fault but reboot is needed! Some data about the hardware: # inxi -bZ System: Host: hakla04 Kernel: 6.4.0-rc1-P3 arch: i686 bits: 32 Console: pty pts/0 Distro: Gentoo Base System release 2.13 Machine: Type: Desktop Mobo: Shuttle model: FS51 serial: N/A BIOS: Phoenix v: 6.00 PG date: 12/02/2003 CPU: Info: single core Intel Pentium 4 [MT] speed (MHz): avg: 3062 Graphics: Device-1: AMD RV350 [Radeon 9550/9600/X1050 Series] driver: radeon v: kernel Display: x11 server: X.org v: 1.21.1.8 driver: X: loaded: radeon unloaded: fbdev,modesetting gpu: radeon resolution: resolution: 1920x1080 OpenGL: renderer: llvmpipe (LLVM 15.0.7 128 bits) v: 4.5 Mesa 23.0.2 Network: Device-1: Ralink RT2500 Wireless 802.11bg driver: rt2500pci Device-2: Realtek RTL-8100/8101L/8139 PCI Fast Ethernet Adapter driver: 8139too # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 3.06GHz stepping : 7 microcode : 0x33 cpu MHz : 3062.492 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cpuid cid xtpr bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_unknown bogomips : 6127.19 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Pentium(R) 4 CPU 3.06GHz stepping : 7 microcode : 0x33 cpu MHz : 3062.492 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cpuid cid xtpr bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_unknown bogomips : 6127.06 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management: # lspci 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 651 Host (rev 02) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] LPC Controller (rev 14) 00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 IDE Controller 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0) 00:03.0 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.1 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.2 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.3 USB controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:0a.0 Network controller: Ralink corp. RT2500 Wireless 802.11bg (rev 01) 00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 10) 00:10.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev 46) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series] 01:00.1 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550/9600/X1050 Series] (Secondary) Kernel .config and dmesg attached. Regards, Erhard