Hey all -

The ReiserFS FAQ that we quote and point people to when they ask 
questions about limits in ReiserFS states that the maxmimum file size 
for a reiserfs v3 filesystem is 2^60-1. However, the actual limits, in 
practice, are far less.

I tried to create a 3 TB sparse file, and ended up getting told it was 
too large. 2 TB was too large also, just under 2 TB was ok.

This is a result of super->s_maxbytes = (512LL << 32) - s->s_blocksize;, 
in fs/reiserfs/super.c, which is set so that i_blocks isn't overflowed.

Other filesystems that have the ability to cross the 2 TB limit on file 
sizes simply ignore the limit and allow i_blocks to wrap. There's really 
no reason we can't do the same.

The patch is attached.

-Jeff

-- 
Jeff Mahoney
SuSE Labs