Hello I found a bad bit in my RAM with memtest86 somewhere after 120M on a 128M module. So, if I pass a parameter like mem=(total-4M) to the kernel, will exactly those last 4M of RAM not be used, or is not guaranteed? Intuitively, the answer should be "yes". Yes, that board is the last of the 2, at least as reported by memtest - it reports address a bit above 380M. BTW, the error I see appears only at one bit and only when tested with one pattern, and not every pass... How bad is this actually? Thanks Guennadi --------------------------------- Guennadi Liakhovetski, Ph.D. DSA Daten- und Systemtechnik GmbH Pascalstr. 28 D-52076 Aachen Germany -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/