Date: Tue, 15 Feb 2000 16:25:11 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: John Milford <jwm@CSUA.Berkeley.EDU> Cc: Peter Wemm <peter@netplex.com.au>, Joe Greco <jgreco@ns.sol.net>, hackers@FreeBSD.ORG Subject: Re: Filesystem size limit? Message-ID: <200002160025.QAA46340@apollo.backplane.com> References: <200002151924.LAA02584@soda.csua.Berkeley.edu>
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:>
:> ie: there is a signed 32 bit sector count limit. 2^31 == 1TB. It shouldn't
:> be too hard to get it to create 2^32 bit (2TB) filesystem though. I'd expect
:> there to be more problems that this to bite you though. :-(
:>
:> 2^31 also happens to be the mmap() file offset limit FWIW.
No it isn't. mmap() (under FreeBSD) takes an off_t for the file offset,
so the file offset limit is 2^63. The size of your map is limited to
the size of the user address space minus things already mapped --
around 3 GB on IA32.
-Matt
Matthew Dillon
<dillon@backplane.com>
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