BUG 797254 - Maximum file size in Linux needs fixing

[pv@xxxxxxxxxxxxx (lord@xxxxxxx)]

View Incident: 
http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&view_type=Bug&wi=797254

Submitter : lord                      Submitter Domain : sgi.com            
Assigned Engineer : btg               Assigned Domain : sgi.com             
Assigned Group : xfs-linux            Category : software                   
Customer Reported : F                 Priority : 3                          
Project : xfs-linux                   Status : open                         
Description :
We are currently building the linux code with XFS_BIG_FILES
set to 1. There are a couple of problems with this.

1. The way we are doing it:

#ifndef XFS_BIG_FILES
#if _MIPS_SIM == _ABI64
#define XFS_BIG_FILES           1
#else
#define XFS_BIG_FILES           0
#endif
#endif

We are using the MIPS ABI definition to control things!

2. It is controlling the definition of XFS_MAX_FILE_OFFSET
and setting it to ((1ULL<<63)-1ULL))

The maximum file offset we can support in Linux is actually
((1ULL<<43)-1ULL)) due to some size restrictions in the page
cache.