From a RHEL 7 major release compatibility perspective noticed memory reported as GB instead MB.

This could cause issues for customers using this data in scripts/etc.

Perhaps RHEL 7 should revert this one change the rebase picks up?
  https://github.com/mirror/dmidecode/commit/b381d53

Hi, James Hartsock 

That patch you mentioned should be a good improvement, it can better show the results to users.

Thanks for your concern about this issue. If people are worrying about it, I can provide a document to report this change in the Doc Text field. What's your opinion?

(In reply to lijiang from comment #13)
> Hi, James Hartsock 
> 
> That patch you mentioned should be a good improvement, it can better show
> the results to users.
> 
> Thanks for your concern about this issue. If people are worrying about it, I
> can provide a document to report this change in the Doc Text field. What's
> your opinion?

I agree it is a great change for humans looking at it.  I worry about scripts parsing this data that have worked since RHEL 7.0 to start failing.  But do NOT have a good feel on how many people have scripts looking at this specific line item either.  But overall, I think minor enough that a note in Doc Text field works in my view. Thank you.

Thank you, James.

I will revert this patch: b381d53c1199 ("Use larger units for memory device and BIOS size").

Verified on a Lenovo SR655 system with AMD Rome CPUs.  This BZ does not say which specific features are needed from the latest dmidecode upstream, so I just queried a few sample tables.  If there is something specific needed from the update, let me know and I will run more tests.


[root@lenovo-sr655-01 ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 7.9 Beta (Maipo)

[root@lenovo-sr655-01 ~]# lscpu | grep -i -e family -e model -e stepping
CPU family:            23
Model:                 49
Model name:            AMD EPYC 7452 32-Core Processor
Stepping:              0

[root@lenovo-sr655-01 ~]# rpm -q dmidecode
dmidecode-3.2-5.el7.x86_64

[root@lenovo-sr655-01 ~]# rpm -q --changelog dmidecode | head
* Mon Mar 30 2020 Lianbo Jiang <lijiang> - 1:3.2-5
- Revert this patch("Use larger units for memory device and BIOS size")
- Resolves: rhbz#1767323

* Wed Mar 18 2020 Lianbo Jiang <lijiang> - 1:3.2-4
- Fix System Slot Information for PCIe SSD
- Resolves: rhbz#1793900
- Sync with upstream(commit:62bce59fed1)                                 <-- update
- Resolves: rhbz#1767323

[root@lenovo-sr655-01 ~]# dmidecode -t bios -t system -t processor
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
	Vendor: Lenovo
	Version: CFE101X
	Release Date: 06/13/2019
	Address: 0xF0000
	Runtime Size: 64 kB
	ROM Size: 16 MB
	Characteristics:
		PCI is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		BIOS ROM is socketed
		EDD is supported
		5.25"/1.2 MB floppy services are supported (int 13h)
		3.5"/720 kB floppy services are supported (int 13h)
		3.5"/2.88 MB floppy services are supported (int 13h)
		Print screen service is supported (int 5h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 1.0

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: Lenovo
	Product Name: ThinkSystem SR655 -[7Y98XXXXXX]-
	Version: 0500   
	Serial Number: 0123456789
	UUID: 247ad3cd-6187-e911-97a7-9a5d29245896
	Wake-up Type: Power Switch
	SKU Number: none   
	Family: ThinkSystem

Handle 0x0029, DMI type 12, 5 bytes
System Configuration Options
	Option 1: JP3, CLEAR CMOS, 1-2 Default, 2-3 Clear RTC
	Option 2: JP11, FPGA FLASH EN, 1-2 Default, 2-3 FPGA Flash En
	Option 3: JP4, MANUFATURE MODE, 1-2 Default, 2-3 Manufature Mode
	Option 4: JP5, BIOS RECOVER, 1-2 Default, 2-3 BIOS Recover
	Option 5: JP6, CLEAR PASSWORD, 1-2 Default, 2-3 Clear Password
	Option 6: JP10 TPM PP, 1-2 No Control, 2-3 TPM Physical Presence
	Option 7: SW1 Debug Switch, SW[2-1] 00 Port 80, 10 Port 81, 01 Port 82, 11 Port 83
	Option 8: SW1 Debug Switch, SW[3] 0 Normal, 1 Power debug mode
	Option 9: SW1 Debug Switch, SW[4] Reserved.
	Option 10: SW1 Debug Switch, SW[5] Reserved for BMC.
	Option 11: SW1 Debug Switch, SW[6-7] Reserved for UEFI.

Handle 0x002B, DMI type 32, 20 bytes
System Boot Information
	Status: No errors detected

Handle 0x0044, DMI type 4, 48 bytes
Processor Information
	Socket Designation: CPU1
	Type: Central Processor
	Family: Zen
	Manufacturer: Advanced Micro Devices, Inc.
	ID: 10 0F 83 00 FF FB 8B 17
	Signature: Family 23, Model 49, Stepping 0
	Flags:
		FPU (Floating-point unit on-chip)
		VME (Virtual mode extension)
		DE (Debugging extension)
		PSE (Page size extension)
		TSC (Time stamp counter)
		MSR (Model specific registers)
		PAE (Physical address extension)
		MCE (Machine check exception)
		CX8 (CMPXCHG8 instruction supported)
		APIC (On-chip APIC hardware supported)
		SEP (Fast system call)
		MTRR (Memory type range registers)
		PGE (Page global enable)
		MCA (Machine check architecture)
		CMOV (Conditional move instruction supported)
		PAT (Page attribute table)
		PSE-36 (36-bit page size extension)
		CLFSH (CLFLUSH instruction supported)
		MMX (MMX technology supported)
		FXSR (FXSAVE and FXSTOR instructions supported)
		SSE (Streaming SIMD extensions)
		SSE2 (Streaming SIMD extensions 2)
		HTT (Multi-threading)
	Version: AMD EPYC 7452 32-Core Processor                
	Voltage: 1.1 V
	External Clock: 100 MHz
	Max Speed: 3350 MHz
	Current Speed: 2350 MHz
	Status: Populated, Enabled
	Upgrade: Socket SP3
	L1 Cache Handle: 0x0041
	L2 Cache Handle: 0x0042
	L3 Cache Handle: 0x0043
	Serial Number: Unknown
	Asset Tag: Unknown
	Part Number: Unknown
	Core Count: 32
	Core Enabled: 32
	Thread Count: 64
	Characteristics:
		64-bit capable
		Multi-Core
		Hardware Thread
		Execute Protection
		Enhanced Virtualization
		Power/Performance Control

Handle 0x006B, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Long
	Installable Languages: 2
		en|US|iso8859-1
		zh|CN|unicode
	Currently Installed Language: en|US|iso8859-1

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (dmidecode bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:3900