CODEWITHSUNDEEP
windowspaging
Nathan Fellman
Nathan Fellman

Reputation: 127468

How can I tell Windows to keep a page and not evict it?

I want to allocate a chunk of memory in Windows and be sure that it will get no #GP or #PF faults. Regarding #GP, it's my responsibility as a programmer to ensure that I do not exceed any bounds. However, #PF are the the responsibility of the OS, since it can choose whether or not to evict a page.

I imagine that if I use the same page frequently, the OS will be smart enough not to evict it. However, if I want to allocate a large block of memory, then it'll take me a while to reach some of the pages, and I don't want the OS to evict it in the meanwhile.

Is there any way to tell Windows to keep a page present so that I never get a page fault?

ote: This is similar to to the question How can I tell Linux to keep a page and not evict it? except that this one is about Windows

Upvotes: 0

Views: 80

Answers (1)

Mat
Mat

Reputation: 206729

Have a look at the VirtualLock function:

Locks the specified region of the process's virtual address space into physical memory, ensuring that subsequent access to the region will not incur a page fault.

There's an example in this page: Creating Guard Pages.

Upvotes: 2

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