syncfs python script which may help to reproduce the bug

syncfs.py (text/plain), 550 bytes, created by Zac Medico on 2014-11-01 07:45:21 UTC

#!/usr/bin/env python

import ctypes
import ctypes.util
import os
import sys

def main(args) :

	usage = "usage: syncfs.py <filename>\n"

	if len(args) != 1:
		sys.stderr.write(usage)
		return 2

	try:
		fd = os.open(args[0], os.O_RDONLY)
	except OSError:
		sys.stderr.write(usage)
		return 2
	else:

		try:
			filename = ctypes.util.find_library("c")
			library = ctypes.CDLL(filename, use_errno=True)
			if library.syncfs(fd) != 0:
				return 1
		finally:
			os.close(fd)

	return os.EX_OK

if __name__ == '__main__':
	sys.exit(main(sys.argv[1:]))