Most recent kernel where this bug did not occur: unknown
Distribution: SUSE 10.0
Hardware Environment: x86
Software Environment:
Problem Description:

POSIX requires that truncate() only change the ctime and mtime on the file if
the file size actually changes (see "man 3p truncate").  On ext2 and ext3, this
seems to work as required. 

However, ox XFS, truncate() changes the timestamps of the file even if the file
size remains unchanged.  This should not happen.

Steps to reproduce:

Something like the following can be used to test:
...

int main(int argc, char *argv[])
{
    if (truncate(argv[1], atoi(argv[2])) == -1) 
        perror("truncate")
}