@helios

I fail to see the fact that this would ever be a KDE bug. fsync only
*helps*, it will never ever make sure that things will be solved
permanently for good. The reason that a rename() is used with a temp
file that *nothing* can get 100% durability (even using fsync).  App
developers want atomicity (with rename), because atomicity, they can get
with a good filesystem design and implementation. 100% durability is
impossible, power syncs during a fsync will also result in halfly
written files, it will still suck that the rename() has been done at
that point.

Hence, as it is impossible to solve the problem of durability with fsync
and because fsync is slow, it should not even be used IMHO.

-- 
Ext4 data loss
https://bugs.launchpad.net/bugs/317781
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which is subscribed to ecryptfs-utils in ubuntu.

Status in “ecryptfs-utils” source package in Ubuntu: Invalid
Status in “linux” source package in Ubuntu: Fix Committed
Status in ecryptfs-utils in Ubuntu Jaunty: Invalid
Status in linux in Ubuntu Jaunty: Fix Committed

Bug description:
I recently installed Kubuntu Jaunty on a new drive, using Ext4 for all my data.

The first time i had this problem was a few days ago when after a power loss 
ktimetracker's config file was replaced by a 0 byte version . No idea if 
anything else was affected.. I just noticed ktimetracker right away.

Today, I was experimenting with some BIOS settings that made the system crash 
right after loading the desktop. After a clean reboot pretty much any file 
written to by any application (during the previous boot) was 0 bytes.
For example Plasma and some of the KDE core config files were reset. Also some 
of my MySQL databases were killed...

My EXT4 partitions all use the default settings with no performance tweaks. 
Barriers on, extents on, ordered data mode..

I used Ext3 for 2 years and I never had any problems after power losses or 
system crashes.

Jaunty has all the recent updates except for the kernel that i don't upgrade 
because of bug #315006

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-4-generic 2.6.28-4.6
ProcCmdLine: root=UUID=81942248-db70-46ef-97df-836006aad399 ro rootfstype=ext4 
vga=791 all_generic_ide elevator=anticipatory
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-4.6-generic
SourcePackage: linux

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