Re: Q: PAGE_CACHE_SIZE?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 27 May 1999 23:06:48 +0100 (BST)

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> A larger page size is no compensation for the lack of a decent
> read-{ahead,back,anywhere} I/O clustering algorithm in the OS.

It isnt compensating for that. If you have 4Gig of memory and a high performance
I/O controller the constant cost per page for VM management begins to dominate
the equation. Its also a win for other CPU related reasons (reduced tlb
misses and the like), and with 4Gig of RAM the argument is a larger page
size isnt a problem.

Alan

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