[dpdk-dev] ivshmem mmap to specific address

[dpdk-dev] ivshmem mmap to specific address

[Eli Britstein]

Hello,



In librte_eal, in eal_ivshmem.c, in function map_all_segments, there is mapping of segments from the metadata to the same virtual address as written in the metadata.

Is there a method to guarantee that this mapping won't fail, even for different processes, that might have large code or constructors running even before main?



Thanks,

Eli



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Re: [dpdk-dev] ivshmem mmap to specific address

[Burakov, Anatoly]

Hi Eli

> Is there a method to guarantee that this mapping won't fail, even for
> different processes, that might have large code or constructors running even
> before main?

I'm afraid there is none. That's the nature of the beast. The best you can do is map stuff into a different address range using --base-virtaddr flag in the primary process and hope that this time your "large code or constructors running before main" won't tread into that virtual address space. But even that is not a guarantee by any means.

Thanks,
Anatoly