Shane,

I think this was fixed in the 2.4.21-27.xx kernel.  What version are you 
using?

-Connie Sieh

On Thu, 3 Feb 2005, Shane Canon wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
> Greetings,
> 
> We discovered something interesting today and I thought I would share it
> with the list.  We noticed that doing a df from SL nodes on some of our
> NFS served directories would return back bogus info (1 block available 0
> ~ used).  Meanwhile, the same df run on some of our older RH72 based
> system returned sane values.  We've traced it down to the following code
> in the kernel (see below).  In our case, the blocks were under the
> overflow threshold but the number of files was not.  I will write a
> patch to work around this for us.  I will share it with the list after
> its done.
> 
> - --Shane
> 
> sample output from two hosts...
> 
> [root@pdsflx320 root]# df -h /auto/snfactry9
> Filesystem            Size  Used Avail Use% Mounted on
> pd0305.nersc.gov:/export/data2/snfactry
> ~                      1.1T  199G  960G  18% /auto/snfactry9
> 
> [root@pc1601 nfs]# df -h /auto/snfactry9
> Filesystem            Size  Used Avail Use% Mounted on
> pd0305.nersc.gov:/export/data2/snfactry
> ~                         1     1     1   0% /auto/snfactry9
> 
> from fs/nfs/incode.c in nfs_statfs
> 
> ~       if (TOOBIG(((res.tbytes + blockres) >> blockbits)))
> ~                goto too_big;
> ~        if (TOOBIG(((res.fbytes + blockres) >> blockbits)))
> ~                goto too_big;
> ~        if (TOOBIG(((res.abytes + blockres) >> blockbits)))
> ~                goto too_big;
> ~        if (TOOBIG(res.tfiles) || TOOBIG(res.afiles))
> ~                goto too_big;
> 
> ~        buf->f_blocks = (res.tbytes + blockres) >> blockbits;
> ~        buf->f_bfree = (res.fbytes + blockres) >> blockbits;
> ~        buf->f_bavail = (res.abytes + blockres) >> blockbits;
> ~        buf->f_files = res.tfiles;
> ~        buf->f_ffree = res.afiles;
> ~        return 0;
> 
> ~ too_big:
> ~        dprintk("nfs_statfs: failed: EOVERFLOW\n");
> ~        buf->f_files = buf->f_ffree = -1;
> 
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.4 (GNU/Linux)
> Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
> 
> iD8DBQFCApD6Zd/2zrI5CioRAqs/AJ9yo+S6XO1yDb7G3B/SfGMTjUjZiQCguSyW
> Pdusw66FlePruPdQrO0kUVU=
> =Vkmq
> -----END PGP SIGNATURE-----
>