vijay baskar wrote: > Hi, "The kernel also allows hardcoded mapping of IO regions into its > virtual address space through the io_block_mapping interface." > > Can u tell me how this is in current arch/powerpc.
Everything is explicitly ioremapped. > Also does it mean that whatever be the size of the ram > 768 MB there > is not going to be much improvement in performance in kernel space > irrespective of invoking CONFIG_HIGHMEM or not? Well, the kernel can use highmem for cache... I'm not sure what you mean by "in kernel space". > Also do you think this low mem be enough if i have lots of kernel > space processes each invoking lots of kmallocs. That depends on what you mean by "lots". :-) You'll have 768MB of lowmem, and kmallocs can only use lowmem. > Will there be bottle necks?? Also what alternative do we have if low > mem of 768 MB is not enough?? You'll need to change the user/kernel split, and deal with anything that breaks in the process. Or get a 64-bit chip. :-) -Scott _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
