View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0018336||CentOS-7||kernel||public||2021-10-25 13:13||2022-05-23 06:13|
|Platform||Production||OS||centos||OS Version||centos 7.6.1810|
|Summary||0018336: Kmalloc-32 consuming servers whole memory|
I am using the centos 7.6.1810 version with the kernel as 3.10.0-957.el7.x86_64. And this centos version I am facing the issue of the kmalloc-32 which is consuming my whole server RAM. Due to which we are unable to perform other actions on the server which causes my Production application to down.
I tried by running:
sync; echo 2 > /proc/sys/vm/drop_caches
But that doesn't help me out.
I am not able to understand what is causing the kmalloc-32 to consume the server's whole memory.
I the attached screenshot of slabtop we can see the kmalloc-32 is having 100% usage.
I search on this I lot but didn't get much on this just to reboot the server. After Rebooting the server the kmalloc-32 memory usage also decreases and my server starts running fine but in the next month, I again face the same issue so I again reboot the server.
Is there any proper solution to remove this problem completely instead of restarting my server again and again?
Note: I am running the Kubernetes application on this machine.
|Tags||#Centos7, 3.10.0-957.21.3.el7, hyper-v, kernel, kernel bug|
> I am using the centos 7.6.1810 version with the kernel as 3.10.0-957.el7.x86_64
ONLY the CURRENT version is supported so you need to update to 7.9.2009 with the latest kernel kernel-3.10.0-1160.45.1.el7.x86_64
All older versions of CentOS 7 (i.e. 7.8 and earlier are explicitly unsupported.
|Thanks for the quick response.|
After updating all my worker's nodes to kernel version: kernel-3.10.0-1160.45.1.el7.x86_64.
Again, my kmalloc-32 is still consuming high memory and due to this, we have to reboot the nodes. And After Rebooting the server, the kmalloc-32 memory usage also decreases, and my server starts running fine, but in the next month, I again face the same issue, so I reboot the server again.
So is there any permanent solution to remove this problem entirely instead of restarting my server again?.
|Please update your kernel to the current version - 3.10.0-1160.66.1|
|2021-10-25 13:13||naman.jain||New Issue|
|2021-10-25 13:13||naman.jain||Tag Attached: #Centos7|
|2021-10-25 13:13||naman.jain||Tag Attached: 3.10.0-957.21.3.el7|
|2021-10-25 13:13||naman.jain||Tag Attached: hyper-v|
|2021-10-25 13:13||naman.jain||Tag Attached: kernel|
|2021-10-25 13:13||naman.jain||Tag Attached: kernel bug|
|2021-10-25 13:13||naman.jain||File Added: kmalloc-32.png|
|2021-10-25 13:21||TrevorH||Note Added: 0038676|
|2021-10-25 18:28||naman.jain||Note Added: 0038677|
|2022-05-23 06:09||naman.jain||Note Added: 0038930|
|2022-05-23 06:09||naman.jain||File Added: Screenshot from 2022-05-12 13-12-23.png|
|2022-05-23 06:13||tigalch||Note Added: 0038931|