Re: application needs fast access to physical memory

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Re: application needs fast access to physical memory

Hello Scott, Do you know whether this patch is necessary if I were to use alloc_bootmem () (to set aside a region of contiguous physical memory) instead of the kernel parameter mem=256? -Steve Lin Scott

application needs fast access to physical memory

My application needs a fast way to access a specific physical DDR memory region. The application runs on an MPC8548 PowerPC which has an MMU. I've tried two approaches that are typical for Linux, mmap() and using a kernel module that implements read()/write() into this region and I'm finding