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* [gentoo-user] Less available memory than installed
@ 2021-06-03 17:16 Toldi Balázs
  2021-06-03 18:59 ` Wols Lists
                   ` (3 more replies)
  0 siblings, 4 replies; 6+ messages in thread
From: Toldi Balázs @ 2021-06-03 17:16 UTC (permalink / raw
  To: gentoo-user

Hello!

In my current PC I have 16 GB of RAM installed. It worked fine until 
today, when I upgraded my CPU from a Ryzen 5 1500X to a Ryzen 7 2700. 
The system boots up just fine, but when I use the free command the total 
memory is only 8 GB. When I looked into the BIOS, it showed me the 
correct amount. What should I do?

Output of some relevant commands:

free -h

                total        used        free      shared buff/cache   
available
Mem:           7,8Gi       4,4Gi       874Mi       192Mi 2,5Gi       3,1Gi

cat /proc/meminfo

MemTotal:        8158220 kB
MemFree:          910036 kB
MemAvailable:    3275008 kB
Buffers:            2848 kB
Cached:          2492392 kB
SwapCached:          260 kB
Active:          1622988 kB
Inactive:        4198676 kB
Active(anon):       9500 kB
Inactive(anon):  3507660 kB
Active(file):    1613488 kB
Inactive(file):   691016 kB
Unevictable:          64 kB
Mlocked:              64 kB
SwapTotal:      16777212 kB
SwapFree:       16775140 kB
Dirty:               732 kB
Writeback:             0 kB
AnonPages:       3326444 kB
Mapped:          1322720 kB
Shmem:            193816 kB
KReclaimable:     160248 kB
Slab:             556240 kB
SReclaimable:     160248 kB
SUnreclaim:       395992 kB
KernelStack:       32704 kB
PageTables:        58964 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    20856320 kB
Committed_AS:   15151980 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      260776 kB
VmallocChunk:          0 kB
Percpu:            10944 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:               0 kB
DirectMap4k:     1638688 kB
DirectMap2M:     6699008 kB
DirectMap1G:     1048576 kB


  lshw -C memory

*-memory
        description: System Memory
        physical id: 27
        slot: System board or motherboard
        size: 7967MiB
      *-bank:0
           description: [empty]
           product: Unknown
           vendor: Unknown
           physical id: 0
           serial: Unknown
           slot: DIMM 0
      *-bank:1
           description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 
2400 MHz (0,4 ns) [empty]
           product: 9905702-120.A00G
           vendor: Kingston
           physical id: 1
           serial: EE963485
           slot: DIMM 1
           width: 64 bits
           clock: 2400MHz (0.4ns)
      *-bank:2
           description: [empty]
           product: Unknown
           vendor: Unknown
           physical id: 2
           serial: Unknown
           slot: DIMM 0
      *-bank:3
           description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 
2400 MHz (0,4 ns) [empty]
           product: Unknown
           vendor: Unknown
           physical id: 3
           serial: 08240800
           slot: DIMM 1
           width: 64 bits
           clock: 2400MHz (0.4ns)


uname -a

Linux GlaDOS 5.10.27-gentoo #4 SMP Thu Jun 3 18:19:23 CEST 2021 x86_64 
AMD Ryzen 7 2700 Eight-Core Processor AuthenticAMD GNU/Linux




^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [gentoo-user] Less available memory than installed
  2021-06-03 17:16 [gentoo-user] Less available memory than installed Toldi Balázs
@ 2021-06-03 18:59 ` Wols Lists
  2021-06-03 19:03 ` Dale
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 6+ messages in thread
From: Wols Lists @ 2021-06-03 18:59 UTC (permalink / raw
  To: gentoo-user

On 03/06/21 18:16, Toldi Balázs wrote:
> Hello!
> 
> In my current PC I have 16 GB of RAM installed. It worked fine until
> today, when I upgraded my CPU from a Ryzen 5 1500X to a Ryzen 7 2700.
> The system boots up just fine, but when I use the free command the total
> memory is only 8 GB. When I looked into the BIOS, it showed me the
> correct amount. What should I do?

What does the mobo manual say? Are your memory boards in the correct
banks? It could be the MMU in the Ryzen 7 insists on banks 1 & 2 being
filled before 3 & 4 while the 5 isn't so fussy.

I don't know about this, not having this sort of problem before, but I
do know from building my own systems that the memory boards need to be
paired up correctly, however you define "correct" ...

Cheers,
Wol


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [gentoo-user] Less available memory than installed
  2021-06-03 17:16 [gentoo-user] Less available memory than installed Toldi Balázs
  2021-06-03 18:59 ` Wols Lists
@ 2021-06-03 19:03 ` Dale
  2021-06-03 19:09 ` thelma
  2021-06-03 20:20 ` [SOLVED] " Toldi Balázs
  3 siblings, 0 replies; 6+ messages in thread
From: Dale @ 2021-06-03 19:03 UTC (permalink / raw
  To: gentoo-user

Toldi Balázs wrote:
> Hello!
>
> In my current PC I have 16 GB of RAM installed. It worked fine until
> today, when I upgraded my CPU from a Ryzen 5 1500X to a Ryzen 7 2700.
> The system boots up just fine, but when I use the free command the
> total memory is only 8 GB. When I looked into the BIOS, it showed me
> the correct amount. What should I do?
>
> Output of some relevant commands:
>
> free -h
>
>                total        used        free      shared buff/cache  
> available
> Mem:           7,8Gi       4,4Gi       874Mi       192Mi 2,5Gi      
> 3,1Gi
>
> cat /proc/meminfo
>
> MemTotal:        8158220 kB
> MemFree:          910036 kB
> MemAvailable:    3275008 kB
> Buffers:            2848 kB
> Cached:          2492392 kB
> SwapCached:          260 kB
> Active:          1622988 kB
> Inactive:        4198676 kB
> Active(anon):       9500 kB
> Inactive(anon):  3507660 kB
> Active(file):    1613488 kB
> Inactive(file):   691016 kB
> Unevictable:          64 kB
> Mlocked:              64 kB
> SwapTotal:      16777212 kB
> SwapFree:       16775140 kB
> Dirty:               732 kB
> Writeback:             0 kB
> AnonPages:       3326444 kB
> Mapped:          1322720 kB
> Shmem:            193816 kB
> KReclaimable:     160248 kB
> Slab:             556240 kB
> SReclaimable:     160248 kB
> SUnreclaim:       395992 kB
> KernelStack:       32704 kB
> PageTables:        58964 kB
> NFS_Unstable:          0 kB
> Bounce:                0 kB
> WritebackTmp:          0 kB
> CommitLimit:    20856320 kB
> Committed_AS:   15151980 kB
> VmallocTotal:   34359738367 kB
> VmallocUsed:      260776 kB
> VmallocChunk:          0 kB
> Percpu:            10944 kB
> HugePages_Total:       0
> HugePages_Free:        0
> HugePages_Rsvd:        0
> HugePages_Surp:        0
> Hugepagesize:       2048 kB
> Hugetlb:               0 kB
> DirectMap4k:     1638688 kB
> DirectMap2M:     6699008 kB
> DirectMap1G:     1048576 kB
>
>
>  lshw -C memory
>
> *-memory
>        description: System Memory
>        physical id: 27
>        slot: System board or motherboard
>        size: 7967MiB
>      *-bank:0
>           description: [empty]
>           product: Unknown
>           vendor: Unknown
>           physical id: 0
>           serial: Unknown
>           slot: DIMM 0
>      *-bank:1
>           description: DIMM DDR4 Synchronous Unbuffered (Unregistered)
> 2400 MHz (0,4 ns) [empty]
>           product: 9905702-120.A00G
>           vendor: Kingston
>           physical id: 1
>           serial: EE963485
>           slot: DIMM 1
>           width: 64 bits
>           clock: 2400MHz (0.4ns)
>      *-bank:2
>           description: [empty]
>           product: Unknown
>           vendor: Unknown
>           physical id: 2
>           serial: Unknown
>           slot: DIMM 0
>      *-bank:3
>           description: DIMM DDR4 Synchronous Unbuffered (Unregistered)
> 2400 MHz (0,4 ns) [empty]
>           product: Unknown
>           vendor: Unknown
>           physical id: 3
>           serial: 08240800
>           slot: DIMM 1
>           width: 64 bits
>           clock: 2400MHz (0.4ns)
>
>
> uname -a
>
> Linux GlaDOS 5.10.27-gentoo #4 SMP Thu Jun 3 18:19:23 CEST 2021 x86_64
> AMD Ryzen 7 2700 Eight-Core Processor AuthenticAMD GNU/Linux
>
>
>
>


Could this be a kernel setting issue?  If you boot some other media like
a USB stick, DVD/CD or something, does it show the right amount then? 
If it does, could be a kernel setting.  If not, interesting problem. 

If the BIOS sees it, I doubt it is a hardware issue.  It may not rule it
out 100% but not likely. 

It's amazing that things like this still occur when large amounts of
memory has been around for a good while now. 

Hope that helps?

Dale

:-)  :-)


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [gentoo-user] Less available memory than installed
  2021-06-03 17:16 [gentoo-user] Less available memory than installed Toldi Balázs
  2021-06-03 18:59 ` Wols Lists
  2021-06-03 19:03 ` Dale
@ 2021-06-03 19:09 ` thelma
  2021-06-03 20:20 ` [SOLVED] " Toldi Balázs
  3 siblings, 0 replies; 6+ messages in thread
From: thelma @ 2021-06-03 19:09 UTC (permalink / raw
  To: gentoo-user

On 6/3/21 11:16 AM, Toldi Balázs wrote:
> Hello!
> 
> In my current PC I have 16 GB of RAM installed. It worked fine until today, when I upgraded my CPU from a Ryzen 5 1500X to a Ryzen 7 2700. The system boots up just fine, but when I use the free command the total memory is only 8 GB. When I looked into the BIOS, it showed me the correct amount. What should I do?
> 
> Output of some relevant commands:
> 
> free -h
> 
>                total        used        free      shared buff/cache   available
> Mem:           7,8Gi       4,4Gi       874Mi       192Mi 2,5Gi       3,1Gi
> 
> cat /proc/meminfo
> 
> MemTotal:        8158220 kB
> MemFree:          910036 kB
> MemAvailable:    3275008 kB

[snip]

boot from min-install Getnoo disk and check what is it showing/reporting.


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [SOLVED] [gentoo-user] Less available memory than installed
  2021-06-03 17:16 [gentoo-user] Less available memory than installed Toldi Balázs
                   ` (2 preceding siblings ...)
  2021-06-03 19:09 ` thelma
@ 2021-06-03 20:20 ` Toldi Balázs
  2021-06-03 21:06   ` Wols Lists
  3 siblings, 1 reply; 6+ messages in thread
From: Toldi Balázs @ 2021-06-03 20:20 UTC (permalink / raw
  To: gentoo-user

I tried booting from Minimal install disk. It had the same problem.

Then I tried pulling the two ram sticks out and put them back. It seems 
like this fixed my issue (Although I don't really know what caused it in 
the first place).

Thanks for everyone's suggestions :)




^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [SOLVED] [gentoo-user] Less available memory than installed
  2021-06-03 20:20 ` [SOLVED] " Toldi Balázs
@ 2021-06-03 21:06   ` Wols Lists
  0 siblings, 0 replies; 6+ messages in thread
From: Wols Lists @ 2021-06-03 21:06 UTC (permalink / raw
  To: gentoo-user

On 03/06/21 21:20, Toldi Balázs wrote:
> I tried booting from Minimal install disk. It had the same problem.
> 
> Then I tried pulling the two ram sticks out and put them back. It seems
> like this fixed my issue (Although I don't really know what caused it in
> the first place).
> 
Could it be that the 7 has a higher clock speed than the 5? Maybe one
stick was badly seated (seems like it) and something like that could
easily cause it to "disappear".

> Thanks for everyone's suggestions :)
> 
Cheers,
Wol



^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-06-03 20:25 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-06-03 17:16 [gentoo-user] Less available memory than installed Toldi Balázs
2021-06-03 18:59 ` Wols Lists
2021-06-03 19:03 ` Dale
2021-06-03 19:09 ` thelma
2021-06-03 20:20 ` [SOLVED] " Toldi Balázs
2021-06-03 21:06   ` Wols Lists

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