b3e78977aa79d3754cb7f8143d7ddabd  http://build.planet-lab.org/third-party/linux-2.6.27.tar.bz2
5fa0ef973a905708ec12ac7a2da90aab  http://ftp.kernel.org/pub/linux/kernel/v2.6/patch-2.6.27.50.bz2
f5fdebad83fcfaf555725ee8dcdf95e6  http://www.cs.princeton.edu/~caglar/patch-2.6.27.50-vs2.3.0.36.4.diff