一个Linux 5.15及更新的内核版本的内存占用问题

[lyimoexiao]

超聚变2288Hv5服务器，在安装完Ubuntu 22.04后发现每次开机都会占用大概7GB左右的内存，而且无论如何都没法释放

然后去查了各类信息，都没法解决

但是如果把内核降级到5.10以下，内存占用就恢复正常了。。。

想请教下各位有遇到类似的问题吗？



Ubuntu（XUbuntu 22.04）内核 6.5.0



CentOS 7 （内核 3.10.1）

[astolia]

那些是硬件占用，你要用dmesg | grep mem或journalctl -b 0 | grep mem来看具体的分配情况。

[lyimoexiao]

好像看不出什么问题？

代码： 全选

root@debian:~# dmesg | grep mem
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000006dfff] usable
[    0.000000] BIOS-e820: [mem 0x000000000006e000-0x000000000006ffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000070000-0x000000000009ffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x0000000060efefff] usable
[    0.000000] BIOS-e820: [mem 0x0000000060eff000-0x00000000614fefff] type 20
[    0.000000] BIOS-e820: [mem 0x00000000614ff000-0x00000000704fefff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000704ff000-0x00000000734fefff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000734ff000-0x0000000073ffefff] ACPI data
[    0.000000] BIOS-e820: [mem 0x0000000073fff000-0x0000000073ffffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000074000000-0x000000008fffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fd000000-0x00000000fe7fffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000feb00000-0x00000000feb03fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec80000-0x00000000fed00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000107fffffff] usable
[    0.000509] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[    0.000513] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.001672] e820: update [mem 0x74000000-0xffffffff] usable ==> reserved
[    0.024757] RAMDISK: [mem 0x2a659000-0x2dc3efff]
[    0.024911] ACPI: Reserving FACP table memory at [mem 0x73ff2000-0x73ff2113]
[    0.024913] ACPI: Reserving DSDT table memory at [mem 0x739d9000-0x73fe4c8a]
[    0.024914] ACPI: Reserving FACS table memory at [mem 0x73490000-0x7349003f]
[    0.024915] ACPI: Reserving UEFI table memory at [mem 0x73ffd000-0x73ffd235]
[    0.024917] ACPI: Reserving UEFI table memory at [mem 0x73ffb000-0x73ffb041]
[    0.024918] ACPI: Reserving SSDT table memory at [mem 0x73ffa000-0x73ffa46b]
[    0.024919] ACPI: Reserving SSDT table memory at [mem 0x73ff9000-0x73ff92d7]
[    0.024921] ACPI: Reserving SPMI table memory at [mem 0x73ff8000-0x73ff8040]
[    0.024922] ACPI: Reserving SSDT table memory at [mem 0x73ff7000-0x73ff7070]
[    0.024923] ACPI: Reserving ASF! table memory at [mem 0x73ff6000-0x73ff60a4]
[    0.024925] ACPI: Reserving ASPT table memory at [mem 0x73ff5000-0x73ff5033]
[    0.024926] ACPI: Reserving BOOT table memory at [mem 0x73ff4000-0x73ff4027]
[    0.024928] ACPI: Reserving DBGP table memory at [mem 0x73ff3000-0x73ff3033]
[    0.024929] ACPI: Reserving HPET table memory at [mem 0x73ff1000-0x73ff1037]
[    0.024931] ACPI: Reserving APIC table memory at [mem 0x73ff0000-0x73ff051d]
[    0.024932] ACPI: Reserving MCFG table memory at [mem 0x73fef000-0x73fef03b]
[    0.024933] ACPI: Reserving PCAT table memory at [mem 0x73fee000-0x73fee087]
[    0.024935] ACPI: Reserving SRAT table memory at [mem 0x73fe9000-0x73fede1f]
[    0.024936] ACPI: Reserving SLIT table memory at [mem 0x73fe7000-0x73fe802b]
[    0.024937] ACPI: Reserving WDAT table memory at [mem 0x73fe6000-0x73fe6193]
[    0.024938] ACPI: Reserving WSMT table memory at [mem 0x73fe5000-0x73fe5027]
[    0.024940] ACPI: Reserving PRAD table memory at [mem 0x739d8000-0x739d80d3]
[    0.024941] ACPI: Reserving OEM4 table memory at [mem 0x73892000-0x739d6f63]
[    0.024942] ACPI: Reserving OEM1 table memory at [mem 0x7383d000-0x73891563]
[    0.024944] ACPI: Reserving SSDT table memory at [mem 0x737d3000-0x7383c22f]
[    0.024945] ACPI: Reserving OEM3 table memory at [mem 0x73786000-0x737d2ca3]
[    0.024947] ACPI: Reserving SSDT table memory at [mem 0x73785000-0x7378565a]
[    0.024948] ACPI: Reserving SSDT table memory at [mem 0x73784000-0x73784505]
[    0.024949] ACPI: Reserving FPDT table memory at [mem 0x73783000-0x73783043]
[    0.024951] ACPI: Reserving HEST table memory at [mem 0x73782000-0x737820a7]
[    0.024952] ACPI: Reserving ERST table memory at [mem 0x73781000-0x7378122f]
[    0.024954] ACPI: Reserving BERT table memory at [mem 0x73780000-0x7378002f]
[    0.024955] ACPI: Reserving EINJ table memory at [mem 0x7377f000-0x7377f14f]
[    0.024956] ACPI: Reserving DMAR table memory at [mem 0x7377d000-0x7377d257]
[    0.024958] ACPI: Reserving BGRT table memory at [mem 0x7377e000-0x7377e037]
[    0.025078] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x7fffffff]
[    0.025081] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x87fffffff]
[    0.025083] ACPI: SRAT: Node 1 PXM 1 [mem 0x880000000-0x107fffffff]
[    0.025106] NUMA: Node 0 [mem 0x00000000-0x7fffffff] + [mem 0x100000000-0x87fffffff] -> [mem 0x00000000-0x87fffffff]
[    0.025123] NODE_DATA(0) allocated [mem 0x87ffd5000-0x87fffffff]
[    0.025152] NODE_DATA(1) allocated [mem 0x107ffd4000-0x107fffefff]
[    0.025552]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.025555]   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
[    0.025557]   Normal   [mem 0x0000000100000000-0x000000107fffffff]
[    0.025564] Early memory node ranges
[    0.025565]   node   0: [mem 0x0000000000001000-0x000000000006dfff]
[    0.025567]   node   0: [mem 0x0000000000070000-0x000000000009ffff]
[    0.025568]   node   0: [mem 0x0000000000100000-0x0000000060efefff]
[    0.025570]   node   0: [mem 0x0000000073fff000-0x0000000073ffffff]
[    0.025571]   node   0: [mem 0x0000000100000000-0x000000087fffffff]
[    0.025575]   node   1: [mem 0x0000000880000000-0x000000107fffffff]
[    0.025581] Initmem setup node 0 [mem 0x0000000000001000-0x000000087fffffff]
[    0.025585] Initmem setup node 1 [mem 0x0000000880000000-0x000000107fffffff]
[    0.032108] e820: update [mem 0x55afe000-0x55b10fff] usable ==> reserved
[    0.032163] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[    0.032167] PM: hibernation: Registered nosave memory: [mem 0x0006e000-0x0006ffff]
[    0.032170] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[    0.032172] PM: hibernation: Registered nosave memory: [mem 0x55afe000-0x55b10fff]
[    0.032175] PM: hibernation: Registered nosave memory: [mem 0x60eff000-0x614fefff]
[    0.032176] PM: hibernation: Registered nosave memory: [mem 0x614ff000-0x704fefff]
[    0.032177] PM: hibernation: Registered nosave memory: [mem 0x704ff000-0x734fefff]
[    0.032178] PM: hibernation: Registered nosave memory: [mem 0x734ff000-0x73ffefff]
[    0.032181] PM: hibernation: Registered nosave memory: [mem 0x74000000-0x8fffffff]
[    0.032182] PM: hibernation: Registered nosave memory: [mem 0x90000000-0xfcffffff]
[    0.032183] PM: hibernation: Registered nosave memory: [mem 0xfd000000-0xfe7fffff]
[    0.032185] PM: hibernation: Registered nosave memory: [mem 0xfe800000-0xfeafffff]
[    0.032186] PM: hibernation: Registered nosave memory: [mem 0xfeb00000-0xfeb03fff]
[    0.032187] PM: hibernation: Registered nosave memory: [mem 0xfeb04000-0xfebfffff]
[    0.032188] PM: hibernation: Registered nosave memory: [mem 0xfec00000-0xfec00fff]
[    0.032189] PM: hibernation: Registered nosave memory: [mem 0xfec01000-0xfec7ffff]
[    0.032190] PM: hibernation: Registered nosave memory: [mem 0xfec80000-0xfed00fff]
[    0.032191] PM: hibernation: Registered nosave memory: [mem 0xfed01000-0xfeffffff]
[    0.032192] PM: hibernation: Registered nosave memory: [mem 0xff000000-0xffffffff]
[    0.032194] [mem 0x90000000-0xfcffffff] available for PCI devices
[    0.041860] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[    0.118244] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[    0.172124] Freeing SMP alternatives memory: 36K
[    0.445558] ACPI: PM: Registering ACPI NVS region [mem 0x704ff000-0x734fefff] (50331648 bytes)
[    0.452944] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0x80000000-0x8fffffff] (base 0x80000000)
[    0.452944] PCI: MMCONFIG at [mem 0x80000000-0x8fffffff] reserved in E820
[    0.452944] pmd_set_huge: Cannot satisfy [mem 0x80000000-0x80200000] with a huge-page mapping due to MTRR override.
[    0.457351] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[    0.457351] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[    1.684396] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    1.684398] pci_bus 0000:00: root bus resource [mem 0x000c4000-0x000c7fff window]
[    1.684401] pci_bus 0000:00: root bus resource [mem 0xfe010000-0xfe010fff window]
[    1.684403] pci_bus 0000:00: root bus resource [mem 0x90000000-0x9d7fffff window]
[    1.684405] pci_bus 0000:00: root bus resource [mem 0xd0000000000-0xd0fffffffff window]
[    1.684692] pci 0000:00:04.0: reg 0x10: [mem 0xd0ffff2c000-0xd0ffff2ffff 64bit]
[    1.684896] pci 0000:00:04.1: reg 0x10: [mem 0xd0ffff28000-0xd0ffff2bfff 64bit]
[    1.685095] pci 0000:00:04.2: reg 0x10: [mem 0xd0ffff24000-0xd0ffff27fff 64bit]
[    1.685293] pci 0000:00:04.3: reg 0x10: [mem 0xd0ffff20000-0xd0ffff23fff 64bit]
[    1.685497] pci 0000:00:04.4: reg 0x10: [mem 0xd0ffff1c000-0xd0ffff1ffff 64bit]
[    1.685693] pci 0000:00:04.5: reg 0x10: [mem 0xd0ffff18000-0xd0ffff1bfff 64bit]
[    1.685888] pci 0000:00:04.6: reg 0x10: [mem 0xd0ffff14000-0xd0ffff17fff 64bit]
[    1.686083] pci 0000:00:04.7: reg 0x10: [mem 0xd0ffff10000-0xd0ffff13fff 64bit]
[    1.686546] pci 0000:00:05.4: reg 0x10: [mem 0x9640d000-0x9640dfff]
[    1.687238] pci 0000:00:11.5: reg 0x10: [mem 0x96406000-0x96407fff]
[    1.687256] pci 0000:00:11.5: reg 0x14: [mem 0x9640c000-0x9640c0ff]
[    1.687324] pci 0000:00:11.5: reg 0x24: [mem 0x96380000-0x963fffff]
[    1.687730] pci 0000:00:14.0: reg 0x10: [mem 0xd0ffff00000-0xd0ffff0ffff 64bit]
[    1.688232] pci 0000:00:14.2: reg 0x10: [mem 0xd0ffff32000-0xd0ffff32fff 64bit]
[    1.688476] pci 0000:00:16.0: reg 0x10: [mem 0x9640b000-0x9640bfff 64bit]
[    1.688745] pci 0000:00:16.1: reg 0x10: [mem 0x9640a000-0x9640afff 64bit]
[    1.689029] pci 0000:00:16.4: reg 0x10: [mem 0xd0ffff31000-0xd0ffff31fff 64bit]
[    1.689287] pci 0000:00:17.0: reg 0x10: [mem 0x96404000-0x96405fff]
[    1.689304] pci 0000:00:17.0: reg 0x14: [mem 0x96409000-0x964090ff]
[    1.689373] pci 0000:00:17.0: reg 0x24: [mem 0x96300000-0x9637ffff]
[    1.692567] pci 0000:00:1f.2: reg 0x10: [mem 0x96400000-0x96403fff]
[    1.692967] pci 0000:00:1f.4: reg 0x10: [mem 0xd0ffff30000-0xd0ffff300ff 64bit]
[    1.693174] pci 0000:00:1f.5: reg 0x10: [mem 0xfe010000-0xfe010fff]
[    1.693506] pci 0000:02:00.0: reg 0x10: [mem 0x94000000-0x95ffffff pref]
[    1.693527] pci 0000:02:00.0: reg 0x14: [mem 0x96000000-0x961fffff]
[    1.693654] pci 0000:02:00.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[    1.693834] pci 0000:00:1c.4:   bridge window [mem 0x96000000-0x961fffff]
[    1.693839] pci 0000:00:1c.4:   bridge window [mem 0x94000000-0x95ffffff 64bit pref]
[    1.693943] pci 0000:03:00.0: reg 0x10: [mem 0x90000000-0x93ffffff pref]
[    1.693965] pci 0000:03:00.0: reg 0x14: [mem 0x96200000-0x962fffff]
[    1.694254] pci 0000:00:1c.5:   bridge window [mem 0x96200000-0x962fffff]
[    1.694259] pci 0000:00:1c.5:   bridge window [mem 0x90000000-0x93ffffff 64bit pref]
[    1.697126] pci_bus 0000:17: root bus resource [mem 0x9d800000-0xaaffffff window]
[    1.697129] pci_bus 0000:17: root bus resource [mem 0xd1000000000-0xd1fffffffff window]
[    1.698107] pci 0000:17:05.4: reg 0x10: [mem 0x9df00000-0x9df00fff]
[    1.701565] pci 0000:18:00.0: reg 0x10: [mem 0x9de00000-0x9de1ffff 64bit]
[    1.701582] pci 0000:18:00.0: reg 0x38: [mem 0x9dd00000-0x9ddfffff pref]
[    1.701776] pci 0000:17:00.0:   bridge window [mem 0x9db00000-0x9defffff]
[    1.701780] pci 0000:17:00.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.702098] pci 0000:18:00.0:   bridge window [mem 0x9db00000-0x9dcfffff]
[    1.702103] pci 0000:18:00.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.702219] pci 0000:1a:00.0: reg 0x10: [mem 0xd1ffd000000-0xd1ffdffffff 64bit pref]
[    1.702261] pci 0000:1a:00.0: reg 0x1c: [mem 0xd1fff018000-0xd1fff01ffff 64bit pref]
[    1.702294] pci 0000:1a:00.0: reg 0x30: [mem 0x9dc80000-0x9dcfffff pref]
[    1.702417] pci 0000:1a:00.0: reg 0x184: [mem 0xd1ffec00000-0xd1ffec1ffff 64bit pref]
[    1.702420] pci 0000:1a:00.0: VF(n) BAR0 space: [mem 0xd1ffec00000-0xd1ffeffffff 64bit pref] (contains BAR0 for 32 VFs)
[    1.702446] pci 0000:1a:00.0: reg 0x190: [mem 0xd1fff1a0000-0xd1fff1a3fff 64bit pref]
[    1.702448] pci 0000:1a:00.0: VF(n) BAR3 space: [mem 0xd1fff1a0000-0xd1fff21ffff 64bit pref] (contains BAR3 for 32 VFs)
[    1.703326] pci 0000:1a:00.1: reg 0x10: [mem 0xd1ffc000000-0xd1ffcffffff 64bit pref]
[    1.703367] pci 0000:1a:00.1: reg 0x1c: [mem 0xd1fff010000-0xd1fff017fff 64bit pref]
[    1.703400] pci 0000:1a:00.1: reg 0x30: [mem 0x9dc00000-0x9dc7ffff pref]
[    1.703517] pci 0000:1a:00.1: reg 0x184: [mem 0xd1ffe800000-0xd1ffe81ffff 64bit pref]
[    1.703519] pci 0000:1a:00.1: VF(n) BAR0 space: [mem 0xd1ffe800000-0xd1ffebfffff 64bit pref] (contains BAR0 for 32 VFs)
[    1.703545] pci 0000:1a:00.1: reg 0x190: [mem 0xd1fff120000-0xd1fff123fff 64bit pref]
[    1.703547] pci 0000:1a:00.1: VF(n) BAR3 space: [mem 0xd1fff120000-0xd1fff19ffff 64bit pref] (contains BAR3 for 32 VFs)
[    1.704413] pci 0000:1a:00.2: reg 0x10: [mem 0xd1ffb000000-0xd1ffbffffff 64bit pref]
[    1.704454] pci 0000:1a:00.2: reg 0x1c: [mem 0xd1fff008000-0xd1fff00ffff 64bit pref]
[    1.704487] pci 0000:1a:00.2: reg 0x30: [mem 0x9db80000-0x9dbfffff pref]
[    1.704604] pci 0000:1a:00.2: reg 0x184: [mem 0xd1ffe400000-0xd1ffe41ffff 64bit pref]
[    1.704606] pci 0000:1a:00.2: VF(n) BAR0 space: [mem 0xd1ffe400000-0xd1ffe7fffff 64bit pref] (contains BAR0 for 32 VFs)
[    1.704631] pci 0000:1a:00.2: reg 0x190: [mem 0xd1fff0a0000-0xd1fff0a3fff 64bit pref]
[    1.704634] pci 0000:1a:00.2: VF(n) BAR3 space: [mem 0xd1fff0a0000-0xd1fff11ffff 64bit pref] (contains BAR3 for 32 VFs)
[    1.705493] pci 0000:1a:00.3: reg 0x10: [mem 0xd1ffa000000-0xd1ffaffffff 64bit pref]
[    1.705534] pci 0000:1a:00.3: reg 0x1c: [mem 0xd1fff000000-0xd1fff007fff 64bit pref]
[    1.705567] pci 0000:1a:00.3: reg 0x30: [mem 0x9db00000-0x9db7ffff pref]
[    1.705684] pci 0000:1a:00.3: reg 0x184: [mem 0xd1ffe000000-0xd1ffe01ffff 64bit pref]
[    1.705686] pci 0000:1a:00.3: VF(n) BAR0 space: [mem 0xd1ffe000000-0xd1ffe3fffff 64bit pref] (contains BAR0 for 32 VFs)
[    1.705711] pci 0000:1a:00.3: reg 0x190: [mem 0xd1fff020000-0xd1fff023fff 64bit pref]
[    1.705713] pci 0000:1a:00.3: VF(n) BAR3 space: [mem 0xd1fff020000-0xd1fff09ffff 64bit pref] (contains BAR3 for 32 VFs)
[    1.706559] pci 0000:19:03.0:   bridge window [mem 0x9db00000-0x9dcfffff]
[    1.706565] pci 0000:19:03.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.706855] pci 0000:1c:00.0: reg 0x14: [mem 0x9da00000-0x9da0ffff 64bit]
[    1.706877] pci 0000:1c:00.0: reg 0x1c: [mem 0x9d800000-0x9d8fffff 64bit]
[    1.706906] pci 0000:1c:00.0: reg 0x30: [mem 0x9d900000-0x9d9fffff pref]
[    1.707135] pci 0000:17:02.0:   bridge window [mem 0x9d800000-0x9dafffff]
[    1.708626] pci_bus 0000:3a: root bus resource [mem 0xab000000-0xb87fffff window]
[    1.708628] pci_bus 0000:3a: root bus resource [mem 0xd2000000000-0xd2fffffffff window]
[    1.708929] pci 0000:3a:05.4: reg 0x10: [mem 0xab000000-0xab000fff]
[    1.713627] pci_bus 0000:5d: root bus resource [mem 0xb8800000-0xc5ffffff window]
[    1.713629] pci_bus 0000:5d: root bus resource [mem 0xd3000000000-0xd3fffffffff window]
[    1.714911] pci 0000:5d:05.4: reg 0x10: [mem 0xb8d00000-0xb8d00fff]
[    1.716556] pci 0000:5e:00.0: reg 0x10: [mem 0xd3fffc00000-0xd3fffdfffff 64bit pref]
[    1.716614] pci 0000:5e:00.0: reg 0x20: [mem 0xd3fffe04000-0xd3fffe07fff 64bit pref]
[    1.716632] pci 0000:5e:00.0: reg 0x30: [mem 0xb8880000-0xb88fffff pref]
[    1.716754] pci 0000:5e:00.0: reg 0x184: [mem 0xb8900000-0xb8903fff 64bit]
[    1.716756] pci 0000:5e:00.0: VF(n) BAR0 space: [mem 0xb8900000-0xb89fffff 64bit] (contains BAR0 for 64 VFs)
[    1.716782] pci 0000:5e:00.0: reg 0x190: [mem 0xb8a00000-0xb8a03fff 64bit]
[    1.716784] pci 0000:5e:00.0: VF(n) BAR3 space: [mem 0xb8a00000-0xb8afffff 64bit] (contains BAR3 for 64 VFs)
[    1.717133] pci 0000:5e:00.1: reg 0x10: [mem 0xd3fffa00000-0xd3fffbfffff 64bit pref]
[    1.717190] pci 0000:5e:00.1: reg 0x20: [mem 0xd3fffe00000-0xd3fffe03fff 64bit pref]
[    1.717208] pci 0000:5e:00.1: reg 0x30: [mem 0xb8800000-0xb887ffff pref]
[    1.717316] pci 0000:5e:00.1: reg 0x184: [mem 0xb8b00000-0xb8b03fff 64bit]
[    1.717318] pci 0000:5e:00.1: VF(n) BAR0 space: [mem 0xb8b00000-0xb8bfffff 64bit] (contains BAR0 for 64 VFs)
[    1.717344] pci 0000:5e:00.1: reg 0x190: [mem 0xb8c00000-0xb8c03fff 64bit]
[    1.717346] pci 0000:5e:00.1: VF(n) BAR3 space: [mem 0xb8c00000-0xb8cfffff 64bit] (contains BAR3 for 64 VFs)
[    1.717629] pci 0000:5d:00.0:   bridge window [mem 0xb8800000-0xb8cfffff]
[    1.717633] pci 0000:5d:00.0:   bridge window [mem 0xd3fffa00000-0xd3fffefffff 64bit pref]
[    1.719244] pci_bus 0000:80: root bus resource [mem 0xc6000000-0xd37fffff window]
[    1.719247] pci_bus 0000:80: root bus resource [mem 0xd4000000000-0xd4fffffffff window]
[    1.719312] pci 0000:80:04.0: reg 0x10: [mem 0xd4ffff1c000-0xd4ffff1ffff 64bit]
[    1.719517] pci 0000:80:04.1: reg 0x10: [mem 0xd4ffff18000-0xd4ffff1bfff 64bit]
[    1.719717] pci 0000:80:04.2: reg 0x10: [mem 0xd4ffff14000-0xd4ffff17fff 64bit]
[    1.719923] pci 0000:80:04.3: reg 0x10: [mem 0xd4ffff10000-0xd4ffff13fff 64bit]
[    1.720121] pci 0000:80:04.4: reg 0x10: [mem 0xd4ffff0c000-0xd4ffff0ffff 64bit]
[    1.720317] pci 0000:80:04.5: reg 0x10: [mem 0xd4ffff08000-0xd4ffff0bfff 64bit]
[    1.720515] pci 0000:80:04.6: reg 0x10: [mem 0xd4ffff04000-0xd4ffff07fff 64bit]
[    1.720709] pci 0000:80:04.7: reg 0x10: [mem 0xd4ffff00000-0xd4ffff03fff 64bit]
[    1.721179] pci 0000:80:05.4: reg 0x10: [mem 0xc6000000-0xc6000fff]
[    1.723038] pci_bus 0000:85: root bus resource [mem 0xd3800000-0xe0ffffff window]
[    1.723040] pci_bus 0000:85: root bus resource [mem 0xd5000000000-0xd5fffffffff window]
[    1.723342] pci 0000:85:05.4: reg 0x10: [mem 0xd3800000-0xd3800fff]
[    1.728137] pci_bus 0000:ae: root bus resource [mem 0xe1000000-0xee7fffff window]
[    1.728140] pci_bus 0000:ae: root bus resource [mem 0xd6000000000-0xd6fffffffff window]
[    1.728439] pci 0000:ae:05.4: reg 0x10: [mem 0xe1000000-0xe1000fff]
[    1.733334] pci_bus 0000:d7: root bus resource [mem 0xee800000-0xfbffffff window]
[    1.733337] pci_bus 0000:d7: root bus resource [mem 0xd7000000000-0xd7fffffffff window]
[    1.733642] pci 0000:d7:05.4: reg 0x10: [mem 0xee800000-0xee800fff]
[    1.762308] e820: reserve RAM buffer [mem 0x0006e000-0x0006ffff]
[    1.762311] e820: reserve RAM buffer [mem 0x55afe000-0x57ffffff]
[    1.762313] e820: reserve RAM buffer [mem 0x60eff000-0x63ffffff]
[    1.762333] pci 0000:02:00.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[    1.767658] system 00:01: [mem 0xfed1c000-0xfed3ffff] has been reserved
[    1.767662] system 00:01: [mem 0xfed45000-0xfed8bfff] has been reserved
[    1.767665] system 00:01: [mem 0xff000000-0xffffffff] has been reserved
[    1.767667] system 00:01: [mem 0xfee00000-0xfeefffff] has been reserved
[    1.767670] system 00:01: [mem 0xfed12000-0xfed1200f] has been reserved
[    1.767673] system 00:01: [mem 0xfed12010-0xfed1201f] has been reserved
[    1.767676] system 00:01: [mem 0xfed1b000-0xfed1bfff] has been reserved
[    1.767676] system 00:03: [mem 0xfed20000-0xfed3ffff] has been reserved
[    1.767676] system 00:03: [mem 0xfed90000-0xfed93fff] has been reserved
[    1.767676] system 00:03: [mem 0xff000000-0xffffffff] has been reserved
[    1.767676] system 00:03: [mem 0xfee00000-0xfeefffff] has been reserved
[    1.767676] system 00:04: [mem 0xfd000000-0xfdabffff] has been reserved
[    1.767676] system 00:04: [mem 0xfdad0000-0xfdadffff] has been reserved
[    1.767676] system 00:04: [mem 0xfdb00000-0xfdffffff] has been reserved
[    1.767676] system 00:04: [mem 0xfe000000-0xfe00ffff] has been reserved
[    1.767676] system 00:04: [mem 0xfe011000-0xfe01ffff] has been reserved
[    1.767676] system 00:04: [mem 0xfe036000-0xfe03bfff] has been reserved
[    1.767676] system 00:04: [mem 0xfe03d000-0xfe3fffff] has been reserved
[    1.767676] system 00:04: [mem 0xfe410000-0xfe7fffff] has been reserved
[    1.782477] pci 0000:00:1f.1: reg 0x10: [mem 0xfd000000-0xfdffffff 64bit]
[    1.792264] pci 0000:00:1c.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 01] add_size 200000 add_align 100000
[    1.792268] pci 0000:00:1c.0: bridge window [mem 0x00100000-0x000fffff] to [bus 01] add_size 200000 add_align 100000
[    1.792286] pci 0000:00:1c.0: BAR 14: assigned [mem 0x96500000-0x966fffff]
[    1.792292] pci 0000:00:1c.0: BAR 15: assigned [mem 0xd0000000000-0xd00001fffff 64bit pref]
[    1.792316] pci 0000:00:1c.0:   bridge window [mem 0x96500000-0x966fffff]
[    1.792324] pci 0000:00:1c.0:   bridge window [mem 0xd0000000000-0xd00001fffff 64bit pref]
[    1.792350] pci 0000:00:1c.4:   bridge window [mem 0x96000000-0x961fffff]
[    1.792358] pci 0000:00:1c.4:   bridge window [mem 0x94000000-0x95ffffff 64bit pref]
[    1.792383] pci 0000:00:1c.5:   bridge window [mem 0x96200000-0x962fffff]
[    1.792391] pci 0000:00:1c.5:   bridge window [mem 0x90000000-0x93ffffff 64bit pref]
[    1.792411] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
[    1.792413] pci_bus 0000:00: resource 7 [mem 0x000c4000-0x000c7fff window]
[    1.792415] pci_bus 0000:00: resource 8 [mem 0xfe010000-0xfe010fff window]
[    1.792417] pci_bus 0000:00: resource 9 [mem 0x90000000-0x9d7fffff window]
[    1.792419] pci_bus 0000:00: resource 10 [mem 0xd0000000000-0xd0fffffffff window]
[    1.792423] pci_bus 0000:01: resource 1 [mem 0x96500000-0x966fffff]
[    1.792425] pci_bus 0000:01: resource 2 [mem 0xd0000000000-0xd00001fffff 64bit pref]
[    1.792428] pci_bus 0000:02: resource 1 [mem 0x96000000-0x961fffff]
[    1.792430] pci_bus 0000:02: resource 2 [mem 0x94000000-0x95ffffff 64bit pref]
[    1.792432] pci_bus 0000:03: resource 1 [mem 0x96200000-0x962fffff]
[    1.792434] pci_bus 0000:03: resource 2 [mem 0x90000000-0x93ffffff 64bit pref]
[    1.792616] pci 0000:19:03.0:   bridge window [mem 0x9db00000-0x9dcfffff]
[    1.792624] pci 0000:19:03.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792649] pci 0000:18:00.0:   bridge window [mem 0x9db00000-0x9dcfffff]
[    1.792657] pci 0000:18:00.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792681] pci 0000:17:00.0:   bridge window [mem 0x9db00000-0x9defffff]
[    1.792688] pci 0000:17:00.0:   bridge window [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792714] pci 0000:17:02.0:   bridge window [mem 0x9d800000-0x9dafffff]
[    1.792736] pci_bus 0000:17: resource 5 [mem 0x9d800000-0xaaffffff window]
[    1.792738] pci_bus 0000:17: resource 6 [mem 0xd1000000000-0xd1fffffffff window]
[    1.792741] pci_bus 0000:18: resource 1 [mem 0x9db00000-0x9defffff]
[    1.792743] pci_bus 0000:18: resource 2 [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792745] pci_bus 0000:19: resource 1 [mem 0x9db00000-0x9dcfffff]
[    1.792747] pci_bus 0000:19: resource 2 [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792749] pci_bus 0000:1a: resource 1 [mem 0x9db00000-0x9dcfffff]
[    1.792751] pci_bus 0000:1a: resource 2 [mem 0xd1ffa000000-0xd1fff2fffff 64bit pref]
[    1.792755] pci_bus 0000:1c: resource 1 [mem 0x9d800000-0x9dafffff]
[    1.792822] pci_bus 0000:3a: resource 5 [mem 0xab000000-0xb87fffff window]
[    1.792824] pci_bus 0000:3a: resource 6 [mem 0xd2000000000-0xd2fffffffff window]
[    1.792903] pci 0000:5d:02.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 60] add_size 200000 add_align 100000
[    1.792907] pci 0000:5d:02.0: bridge window [mem 0x00100000-0x000fffff] to [bus 60] add_size 200000 add_align 100000
[    1.792912] pci 0000:5d:03.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 61] add_size 200000 add_align 100000
[    1.792915] pci 0000:5d:03.0: bridge window [mem 0x00100000-0x000fffff] to [bus 61] add_size 200000 add_align 100000
[    1.792923] pci 0000:5d:02.0: BAR 14: assigned [mem 0xb8e00000-0xb8ffffff]
[    1.792926] pci 0000:5d:02.0: BAR 15: assigned [mem 0xd3000000000-0xd30001fffff 64bit pref]
[    1.792929] pci 0000:5d:03.0: BAR 14: assigned [mem 0xb9000000-0xb91fffff]
[    1.792932] pci 0000:5d:03.0: BAR 15: assigned [mem 0xd3000200000-0xd30003fffff 64bit pref]
[    1.792960] pci 0000:5d:00.0:   bridge window [mem 0xb8800000-0xb8cfffff]
[    1.792968] pci 0000:5d:00.0:   bridge window [mem 0xd3fffa00000-0xd3fffefffff 64bit pref]
[    1.792991] pci 0000:5d:02.0:   bridge window [mem 0xb8e00000-0xb8ffffff]
[    1.792998] pci 0000:5d:02.0:   bridge window [mem 0xd3000000000-0xd30001fffff 64bit pref]
[    1.793024] pci 0000:5d:03.0:   bridge window [mem 0xb9000000-0xb91fffff]
[    1.793031] pci 0000:5d:03.0:   bridge window [mem 0xd3000200000-0xd30003fffff 64bit pref]
[    1.793047] pci_bus 0000:5d: resource 5 [mem 0xb8800000-0xc5ffffff window]
[    1.793049] pci_bus 0000:5d: resource 6 [mem 0xd3000000000-0xd3fffffffff window]
[    1.793051] pci_bus 0000:5e: resource 1 [mem 0xb8800000-0xb8cfffff]
[    1.793053] pci_bus 0000:5e: resource 2 [mem 0xd3fffa00000-0xd3fffefffff 64bit pref]
[    1.793055] pci_bus 0000:60: resource 1 [mem 0xb8e00000-0xb8ffffff]
[    1.793057] pci_bus 0000:60: resource 2 [mem 0xd3000000000-0xd30001fffff 64bit pref]
[    1.793062] pci_bus 0000:61: resource 1 [mem 0xb9000000-0xb91fffff]
[    1.793063] pci_bus 0000:61: resource 2 [mem 0xd3000200000-0xd30003fffff 64bit pref]
[    1.793130] pci_bus 0000:80: resource 4 [mem 0xc6000000-0xd37fffff window]
[    1.793132] pci_bus 0000:80: resource 5 [mem 0xd4000000000-0xd4fffffffff window]
[    1.793168] pci_bus 0000:85: resource 5 [mem 0xd3800000-0xe0ffffff window]
[    1.793170] pci_bus 0000:85: resource 6 [mem 0xd5000000000-0xd5fffffffff window]
[    1.793230] pci_bus 0000:ae: resource 5 [mem 0xe1000000-0xee7fffff window]
[    1.793232] pci_bus 0000:ae: resource 6 [mem 0xd6000000000-0xd6fffffffff window]
[    1.793314] pci_bus 0000:d7: resource 5 [mem 0xee800000-0xfbffffff window]
[    1.793317] pci_bus 0000:d7: resource 6 [mem 0xd7000000000-0xd7fffffffff window]
[    1.858326] software IO TLB: mapped [mem 0x000000005aca9000-0x000000005eca9000] (64MB)
[    2.315464] Freeing initrd memory: 55192K
[    2.635884] Freeing unused decrypted memory: 2036K
[    2.637271] Freeing unused kernel image (initmem) memory: 2792K
[    2.647663] Freeing unused kernel image (text/rodata gap) memory: 2040K
[    2.648438] Freeing unused kernel image (rodata/data gap) memory: 1184K
[    3.514178] i2c i2c-0: 4/24 memory slots populated (from DMI)
[    3.514183] i2c i2c-0: Systems with more than 4 memory slots not supported yet, not instantiating SPD
root@debian:~# 

[astolia]

再看下dmesg | grep Memory以及/proc/iomem的内容