[ale] SLES 11 SP4 df

[Brian Stanaland]

Thanks everyone. My customer was using the df command to troubleshoot NFS
issues. They relied on df getting stuck to tell them there was a file
system issue. While it worked it was definitely not the intended use for
df. This will probably come down to "use something else" for that.

--Brian

On Fri, Aug 26, 2016 at 12:49 PM, Niel Bornstein <nbornstein at gmail.com>
wrote:

> 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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-- 
"Anyone who has never made a mistake has never tried anything new." -Albert
Einstein
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