Re: Swapping Kernel Memory?
Re: Swapping Kernel Memory?
- Subject: Re: Swapping Kernel Memory?
- From: Jim Magee <email@hidden>
- Date: Fri, 8 Feb 2008 11:17:01 -0500
On Feb 7, 2008, at 4:01 PM, Terry Lambert wrote:
On Feb 7, 2008, at 11:00 AM, Duane Murphy wrote:
Do I have to do anything special to prevent memory allocated by an
IOKit
kext from getting swapped out?
I have some memory that I would like to never be paged out to VM.
Do I
have to do anything special to make that happen? Or is that memory
already prevented from swapping?
Kernel memory is wired. That's why you should use as little as
possible, since when you allocate kernel memory, you are eating a
chunk of the kernel virtual address space, which is a scarce resource.
Actually, it depends what API you used to allocate the memory. Most
in-kernel allocations are wired automatically, but not all.
--Jim
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