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IDProjectCategoryView StatusLast Update
0018081CentOS-8kernelpublic2021-02-24 11:26
Reportersgaravat Assigned To 
PrioritynormalSeveritymajorReproducibilityalways
Status newResolutionopen 
Product Version8.3.2011 
Summary0018081: Sum of MemTotal values in /sys/devices/system/node/nodex/meminfo is less than the total memory
DescriptionOn a 2 sockets server, I see that the sum of the two MemTotal values in /sys/devices/system/node/node1/meminfo and /sys/devices/system/node/node0/meminfo
is less than the total one (i.e. the one reported in /proc/meminfo).
On some servers we saw a ~6 % difference, in some other servers the difference was much less.

One of the consequence of this problem is that the total memory available through virtualization is less than the one installed on the server
We see this problem with kernel-4.18.0-240.10.1.el8_3.x86_64
We tried to downgrade to kernel-4.18.0-193.28.1.el8_2.x86_64 and the problem disappeared
Steps To ReproduceCompare the sum of MemTotal values in /sys/devices/system/node/nodex/meminfo with the value in /proc/meminfo on a server running centos8.3 with kernel 4.18.0-240.10.1.el8_3.x86_64
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Date Modified Username Field Change
2021-02-24 11:26 sgaravat New Issue