Possible problem using emacs on mounted filesystem.

Possible problem using emacs on mounted filesystem.

[glen stark]

Hi everyone.  

I'm not sure if this is an OS problem or an emacs problem.  The problem 
only manifests itself for me on emacs, so I'm starting there.

I have a folder on an older linux server that I mount with the command:

sudo mount -t cifs -o username=xxx,uid=xxx //pdxenlin66/home/stg xenlin

I use emacs to edit the file.  I edit fine, but when I save the file, the 
next time I try to edit the buffer I get the message "X changed on disk; 
really edit the buffer?".

Does anyone have any idea what's going on here?  This is the first time I 
have such an issue.

Thanks,  Glen

Re: Possible problem using emacs on mounted filesystem.

[Barry Margolin]

In article <dBBYu.20785$C06.15746@fx35.am4>,
 glen stark <g.a.stark@gmail.com> wrote:

> Hi everyone.  
> 
> I'm not sure if this is an OS problem or an emacs problem.  The problem 
> only manifests itself for me on emacs, so I'm starting there.
> 
> I have a folder on an older linux server that I mount with the command:
> 
> sudo mount -t cifs -o username=xxx,uid=xxx //pdxenlin66/home/stg xenlin
> 
> I use emacs to edit the file.  I edit fine, but when I save the file, the 
> next time I try to edit the buffer I get the message "X changed on disk; 
> really edit the buffer?".
> 
> Does anyone have any idea what's going on here?  This is the first time I 
> have such an issue.
> 
> Thanks,  Glen

I think this typically means that the clocks are not synchronized 
between the client and server. The server's clock is ahead of the 
client, so when you save the file its modification time is newer than 
the time you saved.

Make sure you're running NTP on all machines to keep their clocks in 
sync.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

Re: Possible problem using emacs on mounted filesystem.

[glen stark]

On Wed, 26 Mar 2014 19:15:50 -0500, Barry Margolin wrote:

> In article <dBBYu.20785$C06.15746@fx35.am4>,
>  glen stark <g.a.stark@gmail.com> wrote:
> 
>> Hi everyone.
>> 
>> I'm not sure if this is an OS problem or an emacs problem.  The problem
>> only manifests itself for me on emacs, so I'm starting there.
>> 
>> I have a folder on an older linux server that I mount with the command:
>> 
>> sudo mount -t cifs -o username=xxx,uid=xxx //pdxenlin66/home/stg xenlin
>> 
>> I use emacs to edit the file.  I edit fine, but when I save the file,
>> the next time I try to edit the buffer I get the message "X changed on
>> disk; really edit the buffer?".
>> 
>> Does anyone have any idea what's going on here?  This is the first time
>> I have such an issue.
>> 
>> Thanks,  Glen
> 
> I think this typically means that the clocks are not synchronized
> between the client and server. The server's clock is ahead of the
> client, so when you save the file its modification time is newer than
> the time you saved.
> 
> Make sure you're running NTP on all machines to keep their clocks in
> sync.

Thanks for the insight.  I'm pretty sure you're right.  I'm having 
trouble with running ntp on the virtual machine that's running emacs.  
I'll have to try and figure out what's going on there.

G.