Re: [git patches] xfs and block fixes for virtually indexed arches

[Linus Torvalds]

On Thu, 17 Dec 2009, Russell King wrote:
> 
> That's not entirely true.  If you have write back caches which are not DMA
> coherent, you need to as a minimum:
> 
> - on write, clean the cache to ensure that the page is up to date with data
>   held in cache.
> 
> - on read, you must ensure that there are no potential write-backs before
>   the read commenses and invalidate at some point.

Right you are.

		Linus
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