ctime/mtime with different filesystems

[Thorsten Kukuk <kukuk@suse.de>]

Hi,

sometimes some tests fails, because mtime/ctime or atime is not
correct set. The problem are the VFS layer and the different filesystems,
they all have a different understand from when which field is to change.

For example, if you truncate a zero length file to zero, VFS only
send a notifier that ctime has to be updated. ext2 will also update
mtime, reiserfs not.

Is there a document describing the behaviour, to which I could point
our filesystem experts ?

  Thorsten

-- 
Thorsten Kukuk       http://www.suse.de/~kukuk/        kukuk@suse.de
SuSE GmbH            Deutschherrenstr. 15-19       D-90429 Nuernberg
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