Hi Charles,
after reading the comments in asm/stat.h I think that the patch you applied is not correct. The block count (st_blocks) must not be
calculated based on the optimum block size (st_blksize). It must be calculated asuming 512-byte blocks:
...
long st_blksize; /* Optimal block size for I/O. */
long long st_blocks; /* Number 512-byte blocks allocated. */
...
So the correct calculation is:
inode->i_blocks = (inode->i_size + 511) >> 9; /* Number 512-byte blocks allocated. */
(That's the line from JFFS.)
Thanks, Stephan
> -----Original Message-----
> From: Charles Manning [mailto:manningc2@actrix.gen.nz]
> Sent: Mittwoch, 20. August 2003 06:03
> To: Stephan Linke; Yaffs List
> Subject: Re: "du" returns wrong values on yaffs
>
>
> On Tuesday 19 August 2003 21:39, Stephan Linke wrote:
> > Hi,
> > we are using "du" to detect the amount of space occupied by some of our
> > files to keep us from running out of space. Unfortunately YAFFS returns a
> > block count of zero.
> >
> Stepahn I found and ??corrected?? a problem, though I don't know it is 100%
> yet. THis is in cvs.
>
> At best du only provides an estimate and does not account for various other
> overheads (eg. bad blocks, reserved blocks). statfs() , as used by 'df',
> gives a better indicator of free space.
>
> Stephan: please try the new yaffs_fs and see if this helps.
>
> -- Charles
>
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