Messages in this thread | | | Date | Tue, 4 Dec 2001 10:40:47 +0000 | From | Russell King <> | Subject | Re: [OT] Wrapping memory. |
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On Mon, Dec 03, 2001 at 09:11:18AM +0000, David Woodhouse wrote: > ARM used to just break, but I pointed it out to Russell a while ago and I > believe he fixed it. I don't remember what his fix was - it may have been > just to map the offending page uncached, which is also a fairly effective > was of avoiding cache aliasing :)
We actually still map the pages as cached, but when update_mmu_cache detects that a page has been mmapped more than once, we ensure that the other mappings in the current mm will fault when accessed.
-- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html
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