Messages in this thread |  | | | Date | Tue, 20 Jun 2006 14:15:27 +0800 | | From | Qi Yong <> | | Subject | Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3 |
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Linus Torvalds wrote:
>On Fri, 9 Jun 2006, Stephen C. Tweedie wrote: > > >>When is the Linux syscall interface enough? When should we just bump it >>and cut out all the compatibility interfaces? >> >>No, we don't; we let people configure certain obsolete bits out (a.out >>support etc), but we keep it in the tree despite the indirection cost to >>maintain multiple interfaces etc. >> >> > >Right. WE ADD NEW SYSTEM CALLS. WE DO NOT EXTEND THE OLD ONES IN WAYS THAT >MIGHT BREAK OLD USERS. > >Your point was exactly what? > >Btw, where did that 2TB limit number come from? Afaik, it should be 16TB >for a 4kB filesystem, no? > >
Partition tables describe partitions in units of one sector. 2^(32+9) = 2T
To prevent integer overflow, we should use only 31 bits of a 32-bit integer. 2^(31+12) = 8T
There's _terrible_ hacks to really get to 16T.
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