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Ever further off topic :)

Ever further off topic :)

Posted Apr 22, 2009 22:57 UTC (Wed) by nix (subscriber, #2304)
In reply to: Ever further off topic :) by michaeljt
Parent article: Another Linux capabilities hole found

Of course Linux caches file data: in fact it won't work without it.
Absolutely everything that gets put in a page in memory (all file data,
anonymous mmaped pages, you name it) has to pass through the page cache
first. Executables *run* from the page cache: their text pages reside
nowhere else.

There *is* a cache of disk blocks (the buffer cache), but these days it's
used pretty much entirely for metadata (as this doesn't necessarily have a
page in memory devoted to it).


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