On Sun, Jun 4, 2017 at 5:11 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> For UFS2 - yes, for UFS1 we have another hard limit I'd missed. i_blocks
> is in half-kilobyte units there and it's 32bit on-disk. So for UFS1 I'd
> cap it with 1Tb (the real limit is ~ 2Tb - 2Mb, but accurate calculation
> is a bit of a bother). Come to think of that, the minimal block size for
> UFS1 is 4K with pointers-per-block >= 1024. So tree-imposed limit is
> no lower than 1024^3*4096, i.e. greater than that and we could make
> ->s_maxbytes unconditional 1Tb for UFS1.
The nblocks limit (and the 32-bit block numbers) might not limit a
sparse file, so I think the tree-imposed limit might be the final true
limit even on UFS1, no?
Linus
