Hi...
Why we cannot kmalloc(GFP_HIGHUSER) ?
Because it returns virtual address and to get virtual address of pages from
high memory we need to kmap ?
AFAIK your opinion is correct.
Then how to allocate pages from highmem alloc_pages, and then kmap?
correct.
How to free pages from hig
Hi..
I was reading the LDD3's DMA chapter (chapter 15). The author talks
about the splitting of address space between 1GB and 3GB. I couldn't
make myself crystal clear as to why it is done.
because things like code and data must stay and operate in different
modes. Kernel code stays in kernel
On 8/19/07, Tushar Bankar <[EMAIL PROTECTED]> wrote:
> Hello everybody,
> My ultimate goal is to develop the Linux device driver.
> But donno exacly from where to start. Actually I started to read the book
> of LDD 3rd edition by Greg . But when I do it practically ( I mean in
> real-time
Dear all,
I was reading the LDD3's DMA chapter (chapter 15). The author talks
about the splitting of address space between 1GB and 3GB. I couldn't
make myself crystal clear as to why it is done. I got even more
confused when he said kernel can't access physicalmemory address which
is not mapped i
Hello everybody,
My ultimate goal is to develop the Linux device driver.
But donno exacly from where to start. Actually I started to read the book of
LDD 3rd edition by Greg . But when I do it practically ( I mean in
real-time) then only I understands that why,where and how the perticular
