On Fri, Oct 26, 2007 at 10:04:19AM -0500, Kumar Gala wrote: > > On Oct 25, 2007, at 10:51 PM, Surya Ravikiran wrote: > > > Hi, > > > > I am trying to bootup a Linux kernel, on a FS eval board with 256M. > > I pass the kernel argument mem=252M, and see that the kernel boots up > > fine, but with much less memory, ~192M (the closes 64M multiple), and > > I browsed through the code to see that the adjust_total_lowmem > > function does not add up the residual memory to the total memory. > > I am trying to understand why I cannot do this reserving of higher end > > of the RAM during boot up, > > I would appreciate your comments. > > The reason you have 192M is that lowmem is the total amount of memory > that can be covered by up to three CAM entries. In the case of > setting mem=252M that max that three CAM entries can cover is 192M (64 > +64+64). You should be able to access the other 60M via HIGHMEM.
Why doesn't it just use a 256M mapping, and not access the last 4M? -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
