Re: >60gb of reserved memory??

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On 06/21/2018 11:13 AM, Susi Lehtola wrote:
> On 06/21/2018 07:51 PM, Patrick O'Callaghan wrote:
>> AFAIK Fedora uses the available RAM as a) buffer space, and b) the /tmp
>> filesystem.
>>
>> BTW a slightly more user-friendly way to get that info is with the
>> free(1) command.
> 
> The joke is, the >60GB of missing memory doesn't even show up in free:
> 
> $ free
>               total        used        free      shared  buff/cache
> available
> Mem:        2400708     1093732      284844      121920     1022132 957848
> Swap:      62499836           0    62499836
> 
> For some reason the kernel marks it as reserved.
> 
> On 06/21/2018 07:55 PM, Rick Stevens wrote:
>> Try installing htop ("$ sudo dnf install htop"), run it, press F6 and
>> select which memory item you want to sort by. That'll tell you what
>> process is sucking up memory.
> 
> Same goes for htop. It's showing I have 2.29G of memory.
> 
> 
> Update: I upgraded from Fedora 27 to Fedora 28, and the same issue
> persists. Of course, the kernel is almost the same.
> 
> This has to be some weird kernel / BIOS bug...

Can you send us the content of /proc/cmdline?

Also check any RAMdisks you may have (e.g. "df -h | grep tmpfs"). See if
any of them are possibly eating up RAM. I'd suspect /tmp and (possibly)
your swap partition.
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