Messages in this thread | | | From | Ulrich Weigand <> | Subject | Re: [PATCH] flush_cache_page while pte valid | Date | Tue, 12 Nov 2002 22:32:03 +0100 (MET) |
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Manfred Spraul wrote:
>The assumption for the dirty bit is that the i386 cpu are the only cpus >in the world (TM) that maintain the dirty bit in hardware
Not true; the s390 also has a dirty bit in hardware ;-)
To make things more interesting, the s390 dirty bit does not reside in the pte, but in a storage key associated with the *physical* page. The bit is set on any access to the physical page, whether through any virtual mapping, by direct access with dynamic address translation switched off, or by an I/O device moving data directly to main memory.
Bye, Ulrich
-- Dr. Ulrich Weigand weigand@informatik.uni-erlangen.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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