Re: copy_from_user / copy_to_user with no swap space

From: mfbaustx
Date: Mon Oct 16 2006 - 15:47:46 EST


No. Your code may be only partially paged into RAM.
The same can happen for any mmaped data.

That's what I thought I read. But then my question is: with on-demand paging, is it possible to have two processes partially paged? Surely, it MUST be the case that any processes with overlapping logical address spaces must be paged coherently. So, while on-demand "paging-in" allows for partial paging of a process, is it the case that, on a context switch, the user-space PTE's are completely erased (so that you get page-faults and can then on-demand page them in...)?





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