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Editorial Team
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Asked: 2026-05-16T03:16:22+00:00

i compiled a static program using gcc on linux and run it under kvm.

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i compiled a static program using gcc on linux and run it under kvm. I checked every page table entry of this process in guest memory and found that some pages have been mapped and some ones are not. Is this the feature of on-demand paging? My question is whether there is a solution to make all the pte present and mapped in the page table?
E.g. i fork a new process and load a new elf binary, how to make every page mapped in the page table of this new process.
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1 Answer

  1. Editorial Team

    Try out the following system call:

    #include <sys/mman.h>

int mlockall(int flags);

    Set the flags parameter with MCL_FUTURE and it will lock all current and future pages into memory. You can find more info about it here or just type “man mlockall” and you will get a bunch of information.

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