On Fri, Oct 20, 2006 at 02:12:11PM -0700, Linus Torvalds wrote:
> On Fri, 20 Oct 2006, Russell King wrote:
> > Well, looking at do_wp_page() I'm now quite concerned about ARM and COW.
> > I can't see how this code could _possibly_ work with a virtually indexed
> > cache as it stands. Yet, the kernel does appear to work.
>
> It really shouldn't need any extra code, exactly because by the time it
> hits any page-fault, the caches had better be in sync with the physical
> page contents _anyway_ (yes, being virtual, the caches will _duplicate_
> the contents, but since the pages are read-only, that aliasing should be
> perfectly fine).
Oh, of course! That explains why it actually works as expected! Thanks
for filling back in that bit of swapped-out-years-ago-and-lost information.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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