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Loop devices are provided by a kernel module. Therefore, you need special privileges to access them. You also need them to be exposed into your container, or you need to manually create the device files. The quick answer docker run --privileged=true ... An alternative sudo losetup /dev/loop0 test.img mount /dev/loop0 /mnt docker run -v /mnt:/mnt ... ...


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I would try to fix the root cause of this resource contention rather than cgroup trickery. Even on my systems with intensive workloads, SSH access has never been an issue. What type of server is this? What are the specifications of the hardware/OS/distribution? And what the heck is happening on the system to prevent sshd from responding consistently? ...


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You don't have enough RAM to run these 2000 processes. We can see here that you have used all of your 64GB of RAM, and are also using an additional 17GB of swap. Your server is thrashing, trying to swap data in and out, valiantly trying to let each of those 2000 processes do something. But of course it's not working. There are only two solutions here: ...



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