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bug#17833: coreutils 8.22 df
From: |
Pádraig Brady |
Subject: |
bug#17833: coreutils 8.22 df |
Date: |
Wed, 25 Jun 2014 10:17:30 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 |
On 06/22/2014 09:41 AM, Gabor Z. Papp wrote:
> lo lo,
>
> seems like I discovered a problem in 8.22's df util:
>
> $ cat /etc/fstab
> /dev/md0 / ext3 defaults,errors=remount-ro 0 1
> /dev/sda2 swap swap defaults 0 0
> /dev/sdb2 swap swap defaults 0 0
> /dev/md1 /var/archive ext3 defaults,errors=remount-ro 0 1
> /dev/sr0 /mnt/cdrom iso9660 defaults,noauto 0 0
>
> proc /proc proc defaults 0 0
> none /proc/bus/usb usbfs defaults 0 0
>
> $ cat /etc/mtab
> /dev/md0 / ext3 rw,errors=remount-ro 0 0
> proc /proc proc rw,relatime 0 0
> sysfs /sys sysfs rw,relatime 0 0
> tmpfs /dev tmpfs rw,relatime,size=4k,mode=755 0 0
> devpts /dev/pts devpts rw,relatime,mode=620 0 0
> /dev/md1 /var/archive ext3 rw,errors=remount-ro 0 1
> /var/archive/home /home none rw,bind 0 0
> /var/archive/spool /var/spool none rw,bind 0 0
> /var/archive/www /var/lib/www none rw,bind 0 0
Is this mtab really a link to /proc/mounts?
That's the normal case on modern Linux distros.
> $ df-8.22 -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/md0 21G 8.8G 11G 46% /
> tmpfs 4.0K 0 4.0K 0% /dev
>
> And where is /dev/md1 ?
Not sure what's going on here.
Since you've compiled various versions,
could you replace src/df.c in your 8.22 build dir with:
http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=blob_plain;f=src/df.c;hb=HEAD
There have been many df changes since 8.22, so it would
be good to check with the latest.
> running df from coreutils 8.21 shows different result:
>
> $ df-8.21 -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/md0 21G 8.8G 11G 46% /
> tmpfs 4.0K 0 4.0K 0% /dev
> /var/archive/home 273G 244G 29G 90% /home
>
> Still weird.
As part of the device de-duplication logic we used in 8.21
we're favoring '/home' since it's shorter than '/var/archive'
and thus we're using the '/var/archive/home' "device".
> Trying with 8.20:
>
> $ df-8.20 -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/md0 21G 8.8G 11G 46% /
> tmpfs 4.0K 0 4.0K 0% /dev
> /dev/md1 273G 244G 29G 90% /var/archive
I agree that this is the best output for your case.
I suppose we could stat the sources in the de-duplication logic
to favor real devices. I.E. stat '/var/archive/home' and '/dev/md1'
in your case to favor the latter.
thanks,
Pádraig.