GNU bug report logs - #19607
issue with Emacs 24.4.1 but not with 24.3.1 : changed on disk; really edit the buffer

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Package: emacs;

Reported by: Bertrand Brelier <bertrand.brelier <at> gmail.com>

Date: Thu, 15 Jan 2015 16:51:01 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #56 received at 19607 <at> debbugs.gnu.org (full text, mbox):

From: Jakob Unterwurzacher <jakobunt <at> gmail.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 19607 <at> debbugs.gnu.org, Bertrand Brelier <bertrand.brelier <at> gmail.com>
Subject: Re: issue with Emacs 24.4.1 but not with 24.3.1 : changed on disk;
 really edit the buffer
Date: Wed, 28 Jan 2015 00:04:26 +0100

Looks like that's it. I have added printfs so I understand what is 
going on:

   CIFS:

       Emacs should work around this POSIX-conformance bug.
       stat #1: 1422398418.561215369
       stat #2: 1422398418.561215300
       stat #3: 1422398418.561215300


   CIFS + encfs:

       Emacs does not work around this POSIX-conformance bug.
       stat #1: 1422398433.735274107
       stat #2: 1422398433.735274107
       stat #3: 1422398433.735274100


   CIFS + "encfs -o attr_timeout=0":

       Emacs should work around this POSIX-conformance bug.
       stat #1: 1422398527.607547169
       stat #2: 1422398527.607547100
       stat #3: 1422398527.607547100


The kernel caches FUSE stat() values for 1 second by default, this 
defeats emacs' workaround.
Passing "-o attr_timeout=0" to encfs disables that cache.
This bug report was last modified 10 years and 64 days ago.

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