not solved but EXPLAINED : how linux cannot see more than half my ram ? (64bits)

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occurred Dec 21, 2020 at 14:06

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edited Jan 19, 2018 at 14:34

Drav Sloan

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I 'veI've had 8Gb out of 44Gb sticks ... so I try withI've installed some new memory sticks to upgrade to the host to 48Gb but. However I still have only 16Gb available. (out of physical 32GB installed) whatever. Whatever the setup is it is exactly, Linux appears to only see half the installed ram..

There is no hardware issues (testedthe memory has been tested on two other machines (tow different machines exactly))

anyAny idea why ? &, as well as any suggestions on how to activate all of it ? (currently runs fedora26Fedora26/64bits also tested on debianDebian/64bits) regards

free -mfree -m results on coherence with /proc/meminfo/proc/meminfo but dmidecodedmidecode still confirm there are 4 distincts 8Gb ram sticks

BiosBIOS is so limited I can just manage boot order ... There are no options about memory or anything else... And Bios On the BIOS side it confirms 32Gb are present

that'sThat's all I can give usefulluseful information dmesgdmesg analysis did not permit to get anything usefulluseful .

onlyOnly a warning in loop about kvm/virsh setup : block like this one in loop no other informations at all

So why linuxLinux (or any other OSsOSes like BSD and so on) detects/activate only 16GB ?? howHow can I use the full ram ??

I 've had 8Gb out of 44Gb sticks ... so I try with some new sticks to upgrade to 48Gb but I still have only 16Gb available. (out of physical 32GB installed) whatever the setup is it is exactly half the installed ram..

There is no hardware issues (tested on other machines (tow different machines exactly))

any idea why ? & how to activate all of it ? (currently runs fedora26/64bits also tested on debian/64bits) regards

free -m results on coherence with /proc/meminfo but dmidecode still confirm there are 4 distincts 8Gb ram sticks

Bios is so limited I can just manage boot order ... no options about memory or anything else... And Bios side it confirms 32Gb are present

that's all I can give usefull information dmesg analysis did not permit to get anything usefull .

only a warning in loop about kvm/virsh setup : block like this one in loop no other informations at all

So why linux (or any other OSs like BSD and so on) detects/activate only 16GB ?? how can I use the full ram ??

I've had 8Gb out of 44Gb sticks. I've installed some new memory sticks to upgrade to the host to 48Gb. However I still have only 16Gb available (out of physical 32GB installed). Whatever the setup is, Linux appears to only see half the installed ram.

There is no hardware issues (the memory has been tested on two other machines)

Any idea why, as well as any suggestions on how to activate all of it? (currently runs Fedora26/64bits also tested on Debian/64bits)

free -m results on coherence with /proc/meminfo but dmidecode still confirm there are 4 distincts 8Gb ram sticks

BIOS is so limited I can just manage boot order. There are no options about memory or anything else. On the BIOS side it confirms 32Gb are present

That's all I can give useful information dmesg analysis did not permit to get anything useful .

Only a warning in loop about kvm/virsh setup : block like this one in loop no other informations at all

So why Linux (or any other OSes like BSD and so on) detects/activate only 16GB? How can I use the full ram?