Re: Security question: "Text file busy" overwriting executables but not shared libraries?

From: Xavier Bestel (
Date: Sun Oct 14 2001 - 03:17:24 EST

le dim 14-10-2001 à 08:49, Eric W. Biederman a écrit :
> Also read-with-PAGE_COPY has some really interesting implications for the
> page out routines. Because anytime you start the page out you have to
> copy the page. Not exactly when you want to increase the memory presure.
> And not at all suitable for shared libraries.

I didn't understood very well why you would want to swap out a page
marked PAGE_COPY ? Doesn't it make sense to special-case it and just
leave it "in the file", as long as it's untouched ?


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