Re: [webmin-l] tmpfs mount issues

[Richard C. <rch...@aa...>]

Hi Jamie

Sorry I didn't include the error before - but here it is:
Failed to save mount : Remount failed :
mount: /tmp not mounted already, or bad option

I still get this if I try to apply a filesystem size limit to the 
existing tmpfs filesystem. If I leave it unlimited -  I don't get the error.

Richard.

Jamie Cameron wrote:
> On 28/Sep/2009 22:28 Richard Chapman <rch...@aa...> wrote ..
>   
>> Hi Jamie
>>
>> You have allowed multiple tmpfs mounts in the new release of webmin 
>> after I requested this. Many thanks. I have been trying to mount a 
>> second tmpfs as /tmp using webmin - and have encountered some problems I 
>> don't fully understand....
>>
>> 1) I was trying to use the "Maximum Filesystem Size" parameter in the 
>> tmpfs specific options to limit the size each of the tmpfs mounts could 
>> go to. The webmin page doesn't specify what units the size parameter 
>> should use - but "man mount" suggests it should be in "bytes". I tried 
>> using large numbers (100000000) - but webmin seemed to error with 
>> anything over 2000 - so I guessed maybe webmin was assuming megabytes 
>> and converting. However - the webmin parameter seems to go directly into 
>> fstab - and I'm not sure what units are assumed in fstab. Either way - I 
>> couldn't get any sensible limit to my filesystem size using that 
>> parameter. Instead I used the "Maximum Blocks Available" parameter - and 
>> that seemed to work OK.
>>
>> 2) At one stage - I got webmin into a state that I couldn't change a bad 
>> parameter. I had a Max filesystem size set to "500". I'm guessing that 
>> this was so small that the mount failed at boot time - but webmin 
>> thought the filesyatem "/tmp" was mounted. Any attempt to change the 
>> "500" to "unlimited" caused an error either because webmin said the 
>> filesystem is already mounted - or because it said that it couldn't be 
>> dismounted - and it refused to save the changes I made. In the end - I 
>> had to manually edit fstab - and the problem was resolved.
>>
>> My suggestions:
>> 1) Add a hyperlink to the tmpfs specific options to document what units 
>> are required for the various parameters:
>> 2) There seems to be something wrong in webmin to cause it to reject 
>> large values for the Maximum filesystem size parameter.
>> 3) Can the order it does things be changed so that it is possible to 
>> save changes to parameters even if the mount/dismount fails? This 
>> problem arises with filesystems that are normally only mounted at boot time.
>>     
>
> Hi Richard,
>
> Those are good suggestions .. but what is the error you are getting
> from Webmin when you try to enter a large tmpfs size? 
>
>  - Jamie
>
>
>