Caculate the physical address using fd and offset in persistent memory

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yufan jia

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Sep 27, 2022, 11:31:12 PMSep 27
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Hi, just as the title says, I'm wondering if I can get the physical address via fd and offset when I use PM via file mapping. Thanks!

Eduardo Berrocal

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Sep 28, 2022, 11:33:05 AMSep 28
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Hi!,

Not sure what you are trying to do but... PM is mapped by the kernel using virtual memory. What you can get is the virtual address, but that won't help you if your server restarts since PM could be mapped in another address range.
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