As another data point, I am having a similar performance problem with
swsusp on a thinkpad t41p running
2.6.9rc2-mm4. CONFIG_NOHIGHMEM=Y. The strange thing is that there
isn't any performance problem with 2.6.9-rc1-mm4. There are no
substantive changes between the kernel configs. A .config is attached,
in case it will help.
 -nld