Re: flush_anon_page for MIPS

["Franck Bui-Huu" <vagabon.xyz@gmail.com>]

On 3/23/07, Ralf Baechle <ralf@linux-mips.org> wrote:
> Let me illustrate this with a little example.  Assume we have a page at
> physical address 0x5000, a page size of 4kB, an 8kB direct mapped cache
> and 32-byte cache lines.  Then address bits 0..4 will be the byte index
> into the cache line, address bits 5..12 will index the cache array.  So
> now let's map our page into userspace, at address 0x12340000.  In KSEG0
> it is accessible at 0x80005000.  Now, compute the cache index for both
> addresses compare and curse ...
Yes but since the kernel page address is fixed, why not choosing
userspace page addresses to share the same kernel cache index ?
--
              Franck