[ale] SLES 11 SP4 df

[Niel Bornstein]

>From browsing the source code and talking with engineering, it looks
like df calls read_file_system_list() to get the list of mounted
filesystems and calls getmntent() on each one, and then df itself
converts the mount_entry struct into something human-readable. df itself
doesn't go through the filesystems one at a time. So like any other
process, if read_file_system_list() attempts i/o to a filesystem, it
will go into uninterruptible sleep until the i/o completes.

There is a -l option to just show local filesystems, if that helps.

Niel

On 08/25/2016 07:23 PM, Brian Stanaland wrote:
> Has anyone run across this situation?
> 
> It seems the df command in sles 11 sp4 stats all the filesystems before
> displaying anything. This means that when it gets stuck on a network
> file system it just stops doing anything. It's waiting for a reply from
> the file system that will never come. The user knows something is wrong
> but if it displayed results as it went along, they'd know which file
> system isn't responding.
> 
> --Brian
> 
> -- 
> "Anyone who has never made a mistake has never tried anything new."
> -Albert Einstein
> 
> 
> 
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