[Yaffs] [Yaffs-archive] RE: "du" returns wrong values on yaffs

[Stephan Linke]

Hi,

Now there's something strange:
The "du" I use (busybox) still returnes strange values. The reason is that it assumes a block size of 512 bytes and doesn't care for
the file block size returned by lstat. "du" simply divides by 2 to get the number of 1k blocks (already a wrong calculation I
guess).

Filesystems like cramfs and jffs show a similiar stupid behavior. They sai that their block size is PAGE_CACHE_SIZE or PAGE_SIZE (4k
in our case) but use a hard coded 512 to calculate the block count.
It looks to me like there's something wrong in most of the filesystem inodes...

Thanx, 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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