Re: bugs in df [problem of fileutils or kernel?]

Re: bugs in df [problem of fileutils or kernel?]

[Nico Schottelius]

[-- Attachment #1: Type: text/plain, Size: 3398 bytes --]

Alfred M. Szmidt [Tue, Dec 31, 2002 at 08:17:16PM +0100]:
>    I am using 2.5.53,ext3 on /dev/root,isofs on /mnt/dvd and df is
> 
> 2.5.53 of what exactly?

the kernel. I will try 2.5.54 soon,too.

>    flapp:/home/user/nico # df --version
>    df (GNU fileutils) 4.0.35
> 
> Could you try and see if this still presists in GNU Fileutils 4.1 [1]?

nico@flapp:~/fileutils-4.1/src $ ./df  -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/root              18G   19G  136M 100% /
/dev/cdroms/cdrom0     71M   71M     0 100% /mnt/dvd
nico@flapp:~/fileutils-4.1/src $ ./df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root             19228276  19088984    139292 100% /
/dev/cdroms/cdrom0       72434     72434         0 100% /mnt/dvd
nico@flapp:~/fileutils-4.1/src $ ./du /mnt/dvd/ -sh
505M    /mnt/dvd


yes, it does.

> Or if you feel brave GNU Coreutils (an merge of Fileutils, Shutils and
> Textutils) [2]? 

nico@flapp:~/coreutils-4.5.4/src $ ./df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root             19228276  19080532    147744 100% /
/dev/cdroms/cdrom0       72434     72434         0 100% /mnt/dvd
nico@flapp:~/coreutils-4.5.4/src $ ./df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/root              19G   19G  145M 100% /
/dev/cdroms/cdrom0     71M   71M     0 100% /mnt/dvd
nico@flapp:~/coreutils-4.5.4/src $ ./du /mnt/dvd/ -sh
505M    /mnt/dvd/

yes, it does. but at least is the size now correct in -h.

====> now trying with 2.5.54 <====
nico@flapp:~ $ df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root             19228276  19086992    141284 100% /
/dev/cdroms/cdrom0       72434     72434         0 100% /mnt/dvd
nico@flapp:~ $ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/root              18G   19G  137M 100% /
/dev/cdroms/cdrom0     71M   71M     0 100% /mnt/dvd
nico@flapp:~ $ df --version
df (fileutils) 4.1

and the cdrom is again 505 MB big...

nico@flapp:~/coreutils-4.5.4/src $ ./df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root             19228276  19087008    141268 100% /
/dev/cdroms/cdrom0       72434     72434         0 100% /mnt/dvd
nico@flapp:~/coreutils-4.5.4/src $ ./df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/root              19G   19G  138M 100% /
/dev/cdroms/cdrom0     71M   71M     0 100% /mnt/dvd
nico@flapp:~/coreutils-4.5.4/src $ ./du /mnt/dvd/ -sh
505M    /mnt/dvd/


==> so coreutils at least prints correct human values...
    I am still thinking it could be a kernel bug..so I am rebooting to
    2.4.21-pre2.

But this does not make a difference...

> If it still exists in those, could you try debugging
> it?

nice,1002 lines of code in df.c.. okay, let's have a look into it...
(currently I think it _could_ be a kernel bug, so I will pass this message
alon to lkml)

I had a quick view at the code, but didn't have the time to look into
it closely. Perhaps the next days!

Am I the only one where df reports wrong disk space?

Nico


-- 
Please send your messages pgp-signed and/or pgp-encrypted (don't encrypt mails
to mailing list!). If you don't know what pgp is visit www.gnupg.org.
(public pgp key: ftp.schottelius.org/pub/familiy/nico/pgp-key)

[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]

Re: bugs in df [problem of fileutils or kernel?]

[Alfred M. Szmidt]

   nice,1002 lines of code in df.c.. okay, let's have a look into it...
   (currently I think it _could_ be a kernel bug, so I will pass this message
   alon to lkml)

There is no reason why you should read all of df.c, you can use the
GNU Debugger and see what is going on quickly.  Possible places to set
break points might be in [coreutils]/src/df.c:show_dev and/or
[coreutils]/lib/fsusage.c:get_fs_usage.