Bug 1052369 - df does not show all mounted partitions
Summary: df does not show all mounted partitions
Status: CLOSED DUPLICATE of bug 920806
Alias: None
Product: Fedora
Classification: Fedora
Component: coreutils
Version: 20
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Ondrej Vasik
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2014-01-13 17:36 UTC by tgxqojko
Modified: 2014-01-15 07:13 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-01-15 07:13:56 UTC
Type: Bug

Attachments (Terms of Use)
strace df (14.34 KB, text/plain)
2014-01-14 11:15 UTC, tgxqojko
no flags Details
strace df -a (15.78 KB, text/plain)
2014-01-14 11:15 UTC, tgxqojko
no flags Details

Description tgxqojko 2014-01-13 17:36:06 UTC
Description of problem:
The df command does not show all mounted partitions

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. On command line give the df command
2. Observe the result

Actual results:
Not all mounted partitions are shown

Expected results:
Information of all mounted partitions

Additional info:

In fstab I have two nfs mounts defined 
<host>:/mnt/raid/media	/mnt/media		nfs	defaults			    0 0
<host>:/mnt/raid/backup	/mnt/backup		nfs	defaults			    0 0

At boot these both get mounted, but only the first one shows up in the output provided by df. The mount command provides information for both nfs mounts. If I manually umount it and then mount it again it will also show up in df.

Comment 1 Ondrej Vasik 2014-01-14 09:40:22 UTC
Due to the change in the /etc/mtab (instead of simple tab of mounted partitions it is now symlink to /proc/mounts), there is a lot of duplicates in this tab. Therefore, df is trying to reduce the duplicates based on some mechanism - you can get all of the mountpoints using df -a .
Can you please check: 1) Do they appear in df -a?
                      2) Provide strace of both df -a and df , if the mountpoint is available in df -a ?


Comment 2 tgxqojko 2014-01-14 11:15:05 UTC
Created attachment 849888 [details]
strace df

Comment 3 tgxqojko 2014-01-14 11:15:44 UTC
Created attachment 849889 [details]
strace df -a

Comment 4 tgxqojko 2014-01-14 11:16:58 UTC
1) both appear with df -a
2) attached strace output

Comment 5 Ondrej Vasik 2014-01-15 07:13:56 UTC
Thanks, based on the same 1K-blocks size for both mounts, it looks like they have the same device id, right? This is probably the reason for filtering.
I'll close it as duplicate of https://bugzilla.redhat.com/show_bug.cgi?id=920806 - as the issue is already there and you are hitting the same issue. The best way would probably be not suppressing duplicates for remote filesystems. It is on our todo list, but will take some time.

*** This bug has been marked as a duplicate of bug 920806 ***

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