Messages in this thread |  | | Date | Wed, 21 Nov 2001 06:37:26 -0800 (PST) | From | Joerg Pommnitz <> | Subject | Re: copy to suer space |
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Nick LeRoy <nleroy@cs.wisc.edu> wrote:
> Linux executables are "demand paged". What this means is that they are
> loaded as they are "page faulted" in. If low on memory, the kernel > may, at it's discression, discard text pages at any time. When a > discarded page is referenced, a page fault occurs, and the page is re- > loaded from the executable. They are *never* written out to swap > space. The kernel fully expects the text file and the text memory > pages to not be modified during execution.
Clean pages are never written to swap space. If the page is dirty, it's just another data page. If it were otherwise, non-PIC shared libraries that require fixups from the dynamic linker would not work.
Regards Joerg
===== -- Regards Joerg
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