I have some memory corruption detected in low memory messages. I have read about it here, but I'm afraid I can't really make anything out of the discussion. It does indeed happen when I suspend/resume, but unlike others who had similar problems, I do not have a broadcom wifi card. This is all marvell ethernet and no wifi.This is a desktop tower with:Linux gentoomyuser3x86_64 3.10.25-gentoo #1 SMP 2014 x86_64 Intel(R)  Core(TM)2 Quad CPU Q6600 @ 2.40GHz GenuineIntel GNU/LinuxHere is the log output:[12960.735034] Corrupted low memory at ffff88000000fff0 (fff0 phys) = 40000000000000[12960.735035] Corrupted low memory at ffff88000000fff8 (fff8 phys) = 250c60840020[12960.735036] ------------[ cut here ]------------[12960.735042] WARNING: at arch/x86/kernel/check.c:140 check_for_bios_corruption+0x10f/0x120()[12960.735043] Memory corruption detected in low memory[12960.735056] Modules linked in: nouveau cfbfillrect cfbimgblt video mxm_wmi wmi cfbcopyarea ttm fbcon bitblit softcursor font tileblit drm_kms_helper backlight fb fbdev fuse[12960.735060] CPU: 0 PID: 9096 Comm: kworker/0:1 Not tainted 3.10.25-gentoo #1[12960.735061] Hardware name: System manufacturer Maximus Formula/Maximus Formula, BIOS 1403    09/10/2009[12960.735064] Workqueue: events check_corruption[12960.735068]  0000000000000009 ffff8801165fdcf8 ffffffff8157431b ffff8801165fdd38[12960.735070]  ffffffff81045e9b 0000000000000000 0000000000000000 ffff880000010000[12960.735073]  ffffffff819b20b0 0000000000000001 ffff880000000000 ffff8801165fdd98[12960.735074] Call Trace:[12960.735079]  [<ffffffff8157431b>] dump_stack+0x19/0x1b[12960.735082]  [<ffffffff81045e9b>] warn_slowpath_common+0x6b/0xa0[12960.735085]  [<ffffffff81045f71>] warn_slowpath_fmt+0x41/0x50[12960.735087]  [<ffffffff8102bc2f>] check_for_bios_corruption+0x10f/0x120[12960.735090]  [<ffffffff8102bc49>] check_corruption+0x9/0x40[12960.735094]  [<ffffffff81061f8f>] process_one_work+0x17f/0x420[12960.735096]  [<ffffffff81062679>] worker_thread+0x119/0x370[12960.735099]  [<ffffffff81062560>] ? rescuer_thread+0x2f0/0x2f0[12960.735102]  [<ffffffff81068c4b>] kthread+0xbb/0xc0[12960.735105]  [<ffffffff81068b90>] ? kthread_create_on_node+0x120/0x120[12960.735109]  [<ffffffff815819ac>] ret_from_fork+0x7c/0xb0[12960.735111]  [<ffffffff81068b90>] ? kthread_create_on_node+0x120/0x120[12960.735113] ---[ end trace a3687665afd39e38 ]---And verbose lspci -v and some lshw output to better understand my setup, if required:00:00.0 Host bridge: Intel Corporation 82X38/X48 Express DRAM Controller (rev 01)    Subsystem: ASUSTeK Computer Inc. Device 8295    Flags: bus master, fast devsel, latency 0    Capabilities: [e0] Vendor Specific Information: Len=0c <?>00:06.0 PCI bridge: Intel Corporation 82X38/X48 Express Host-Secondary PCI Express Bridge (rev 01) (prog-if 00 [Normal decode])    Flags: bus master, fast devsel, latency 0    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0    I/O behind bridge: 0000d000-0000dfff    Memory behind bridge: fd000000-feafffff    Prefetchable memory behind bridge: 00000000f0000000-00000000f9ffffff    Capabilities: [88] Subsystem: Intel Corporation Device 0000    Capabilities: [80] Power Management version 3    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-    Capabilities: [a0] Express Root Port (Slot+), MSI 00    Capabilities: [100] Virtual Channel    Capabilities: [140] Root Complex Link    Kernel driver in use: pcieport00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 16    I/O ports at c800 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 21    I/O ports at c880 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 18    I/O ports at cc00 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) (prog-if 20 [EHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 18    Memory at fcfffc00 (32-bit, non-prefetchable) [size=1K]    Capabilities: [50] Power Management version 2    Capabilities: [58] Debug port: BAR=1 offset=00a0    Capabilities: [98] PCI Advanced Features    Kernel driver in use: ehci-pci00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)    Subsystem: ASUSTeK Computer Inc. Device 8277    Flags: bus master, fast devsel, latency 0, IRQ 45    Memory at fcff8000 (64-bit, non-prefetchable) [size=16K]    Capabilities: [50] Power Management version 2    Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00    Capabilities: [100] Virtual Channel    Capabilities: [130] Root Complex Link    Kernel driver in use: snd_hda_intel00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode])    Flags: bus master, fast devsel, latency 0    Bus: primary=00, secondary=03, subordinate=03, sec-latency=0    I/O behind bridge: 00001000-00001fff    Memory behind bridge: fa000000-fa3fffff    Prefetchable memory behind bridge: 00000000fbf00000-00000000fbffffff    Capabilities: [40] Express Root Port (Slot+), MSI 00    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-    Capabilities: [90] Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Capabilities: [a0] Power Management version 2    Capabilities: [100] Virtual Channel    Capabilities: [180] Root Complex Link    Kernel driver in use: pcieport00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 02) (prog-if 00 [Normal decode])    Flags: bus master, fast devsel, latency 0    Bus: primary=00, secondary=02, subordinate=02, sec-latency=0    I/O behind bridge: 0000e000-0000efff    Memory behind bridge: feb00000-febfffff    Prefetchable memory behind bridge: 00000000fa400000-00000000fa5fffff    Capabilities: [40] Express Root Port (Slot+), MSI 00    Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-    Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device 8277    Capabilities: [a0] Power Management version 2    Capabilities: [100] Virtual Channel    Capabilities: [180] Root Complex Link    Kernel driver in use: pcieport00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 23    I/O ports at c080 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 19    I/O ports at c400 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 18    I/O ports at c480 [size=32]    Capabilities: [50] PCI Advanced Features    Kernel driver in use: uhci_hcd00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) (prog-if 20 [EHCI])    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0, IRQ 23    Memory at fcfff800 (32-bit, non-prefetchable) [size=1K]    Capabilities: [50] Power Management version 2    Capabilities: [58] Debug port: BAR=1 offset=00a0    Capabilities: [98] PCI Advanced Features    Kernel driver in use: ehci-pci00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) (prog-if 01 [Subtractive decode])    Flags: bus master, fast devsel, latency 0    Bus: primary=00, secondary=04, subordinate=04, sec-latency=32    Capabilities: [50] Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02)    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: bus master, medium devsel, latency 0    Capabilities: [e0] Vendor Specific Information: Len=0c <?>00:1f.2 SATA controller: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode] (rev 02) (prog-if 01 [AHCI 1.0])    Subsystem: ASUSTeK Computer Inc. Device 8277    Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 43    I/O ports at bc00 [size=8]    I/O ports at b880 [size=4]    I/O ports at b800 [size=8]    I/O ports at b480 [size=4]    I/O ports at b400 [size=32]    Memory at fcffe800 (32-bit, non-prefetchable) [size=2K]    Capabilities: [80] MSI: Enable+ Count=1/16 Maskable- 64bit-    Capabilities: [70] Power Management version 3    Capabilities: [a8] SATA HBA v1.0    Capabilities: [b0] PCI Advanced Features    Kernel driver in use: ahci00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)    Subsystem: ASUSTeK Computer Inc. P5K PRO Motherboard    Flags: medium devsel, IRQ 18    Memory at fcfff400 (64-bit, non-prefetchable) [size=256]    I/O ports at 0400 [size=32]01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610] (rev a1) (prog-if 00 [VGA controller])    Subsystem: Gigabyte Technology Co., Ltd Device 3546    Flags: bus master, fast devsel, latency 0, IRQ 16    Memory at fd000000 (32-bit, non-prefetchable) [size=16M]    Memory at f0000000 (64-bit, prefetchable) [size=128M]    Memory at f8000000 (64-bit, prefetchable) [size=32M]    I/O ports at dc00 [size=128]    Expansion ROM at fea00000 [disabled] [size=512K]    Capabilities: [60] Power Management version 3    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+    Capabilities: [78] Express Endpoint, MSI 00    Capabilities: [b4] Vendor Specific Information: Len=14 <?>    Capabilities: [100] Virtual Channel    Capabilities: [128] Power Budgeting <?>    Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>    Kernel driver in use: nouveau    Kernel modules: nouveau01:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1)    Subsystem: Gigabyte Technology Co., Ltd Device 3546    Flags: bus master, fast devsel, latency 0, IRQ 17    Memory at feafc000 (32-bit, non-prefetchable) [size=16K]    Capabilities: [60] Power Management version 3    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+    Capabilities: [78] Express Endpoint, MSI 00    Kernel driver in use: snd_hda_intel02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 12)    Subsystem: ASUSTeK Computer Inc. Motherboard    Flags: bus master, fast devsel, latency 0, IRQ 44    Memory at febfc000 (64-bit, non-prefetchable) [size=16K]    I/O ports at e800 [size=256]    Expansion ROM at febc0000 [disabled] [size=128K]    Capabilities: [48] Power Management version 3    Capabilities: [50] Vital Product Data    Capabilities: [5c] MSI: Enable+ Count=1/1 Maskable- 64bit+    Capabilities: [e0] Express Legacy Endpoint, MSI 00    Capabilities: [100] Advanced Error Reporting    Kernel driver in use: sky2lshw        gentoomyuser3x86_64                  description: Desktop Computer        product: Maximus Formula (To Be Filled By O.E.M.)        vendor: System manufacturer        version: System Version        serial: System Serial Number        width: 64 bits        capabilities: smbios-2.4 dmi-2.4        configuration: boot=normal chassis=desktop family=To Be Filled By O.E.M. sku=To Be Filled By O.E.M. uuid=00020003-0004-0005-0006-000700080009      *-core           description: Motherboard           product: Maximus Formula           vendor: ASUSTeK Computer INC.           physical id: 0           version: Rev 1.xx           serial: MB-1234567890           slot: To Be Filled By O.E.M.         *-firmware              description: BIOS              vendor: American Megatrends Inc.              physical id: 0              version: 1403              date: 09/10/2009              size: 64KiB              capacity: 1984KiB              capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification         *-cpu              description: CPU              product: Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz              vendor: Intel Corp.              physical id: 4              bus info: cpu@0              version: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz              serial: To Be Filled By O.E.M.              slot: LGA775              size: 2394MHz              capacity: 3800MHz              width: 64 bits              clock: 266MHz              capabilities: fpu fpu_exception wp 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 syscall nx x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm tpr_shadow vnmi flexpriority cpufreq            *-cache:0                 description: L1 cache                 physical id: 5                 slot: L1-Cache                 size: 128KiB                 capacity: 128KiB                 capabilities: internal write-back data            *-cache:1                 description: L2 cache                 physical id: 6                 slot: L2-Cache                 size: 8MiB                 capacity: 8MiB                 capabilities: internal write-back instructionThis is Gentoo but on Arch, I can find this. There is mention somewhere of a powerdown package on Arch which allows graceful suspend/resume. I suspend with:echo -n mem > /sys/power/stateSo should I worry about anything and is there anything wrong with the way I suspend my system?As suggested, I have run one full pass with memtest86+ (15mins, 12 tests I think) and no errors came out. This is 2x2gb Corsair. This rig is burnt in and very stable. I have compiled over 1000 Gentoo packages on this.Further testingAfter a community member identified a kernel patch which had been deployed to solve exactly this error(Revert epoll: use freezable blocking call), I tried to apply the patch to my sources. It turns out I already have the patch installed!?I also installed the suspend package which contains s2ram etc. This utility seemingly does nothing different in the way it suspends the computer. I compared logs of suspend and wake up events from using s2ram and then from using the command I use and there is no difference. I conclude that in that respect there is nothing wrong in using echo -n mem > /sys/power/state.I also validated with ethtool that wake on lan is disabled (supports wake on: pg / wake on: d) so it should not interfere with power events if I understand correctly.Maybe a setting in the bios? Or that bios is no longer updated and will trigger that exception and we'll have to live with that.
Memory corruption detected in low memory kernel messages?
linux kernel;power management;suspend