On Fri, May 07, 2021 at 05:25:05AM -0700, Steve Sistare wrote: > To use the restart mode, qemu must be started with the memfd-alloc machine > option. The memfd's are saved to the environment and kept open across exec, > after which they are found from the environment and re-mmap'd. Hence guest > ram is preserved in place, albeit with new virtual addresses in the qemu > process. The caller resumes the guest by calling cprload, which loads > state from the file. If the VM was running at cprsave time, then VM > execution resumes. cprsave supports any type of guest image and block > device, but the caller must not modify guest block devices between cprsave > and cprload.
Does QEMU's existing -object memory-backend-file on tmpfs or hugetlbfs achieve the same thing?
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