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Warning when using an unsupported version of Linux #268
Currently runsc fails with an error like the following because the kernel is missing the memfd_create syscall which was added in Linux 3.17
In theory, we do have a warning: https://github.com/google/gvisor/blob/master/pkg/sentry/memutil/memutil_unsafe.go#L34
I know the plumbing all the way up to the Docker CLI worked when that was added, but it must have regressed since then.