Re: kernel paging (was Hard-limits for kern.maxproc)
Re: kernel paging (was Hard-limits for kern.maxproc)
- Subject: Re: kernel paging (was Hard-limits for kern.maxproc)
- From: Steve Checkoway <email@hidden>
- Date: Sat, 7 Feb 2009 00:39:51 -0800
Thank you Terry, Michael, and Michael. That's all very interesting!
Kernel design decisions are always fascinating.
Just to be clear, I understand the kernel virtual address space being
the scarce resource. I was asking about the possibility of using a
mechanism similar to paging where it was actually reusing portions of
the virtual address space. Of course, demand-paging wouldn't be
possible since the same (virtual) addresses would refer to different
data, depending on some context. Given the apparent complexity of
normal paging, my idea seems completely infeasible.
--
Steve Checkoway
"Anyone who says that the solution is to educate the users
hasn't ever met an actual user." -- Bruce Schneier
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