Messages in this thread | | | Date | Thu, 25 Jul 2002 07:44:40 -0400 (EDT) | From | Alexander Viro <> | Subject | RE: 2.5.28 and partitions |
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On Wed, 24 Jul 2002, Linus Torvalds wrote:
> Note that there is one place where 64 bits is simply _too_ expensive, and > that's the page cache. In particular, the "index" in "struct page". We > want to make "struct page" _smaller_, not larger. > > Right now that means that 16TB really is a hard limit for at least some > device access on a 32-bit machine with a 4kB page-size (yes, you could > make a filesystem that is bigger, but you very fundamentally cannot make > individual files larger than 16TB).
ITYM "8Tb" - indices are signed, IIRC. OTOH, it's not 2^31 * PAGE_SIZE - it's 2^31 * PAGE_CACHE_SIZE, which can be bigger.
Al, still thinking that anybody who does mkfs.<whatever> on a multi-Tb device should seek professional help of the kind they don't give on l-k...
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