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bugs in df [problem of fileutils or kernel?]

DISCUSSION Nico Schottelius 2 participants 2 messages Jan 4, 2003 2 messages not in the archive

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Nico Schottelius

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#2 lore raw
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Alfred M. Szmidt [Tue, Dec 31, 2002 at 08:17:16PM +0100]:

Quoted 3 lines

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.

Quoted 4 lines
   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.

Quoted 2 lines

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...

Quoted 2 lines

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

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#3 lore raw

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.