On 1/16/07, V . Atoka Sema <atrockz@xxxxxxxxx> wrote:
hi everyone,
Im a kernel newbie, i was trying to going throught Temporary
kernel mappings function kmap_atomic from linux 2.6.18 and i got some
doubt, need some help...
For mapping of fixed-mapped linear addresses we are provided with
a region at the end of 4th GB ie from FIXADDR_START and FIXADDR_TOP.
- The size of region depends on number of CPUs.
- A slot is provided for each CPU and each slots contains numbers
of window, around 13.
what is the size of each window, is it of 1 page size each ?
Reading through the code, it looks like it.
what will be tha value of FIX_KMAP_BEGIN in this function, kmap_atomic ?
It'll depend upon the kernel configuration. You can find out the
actual value by looking at the preprocessed source (or may be directly
printing it? :-))
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