Re: [RFC PATCH] Update the cachetlb.txt file WRT flush_dcache_page and update_mmu_cache

[Paul Mundt]

On Mon, May 10, 2010 at 11:16:47AM +0100, Catalin Marinas wrote:
> In most situations, just doing flushing in set_pte_at() would suffice
> and flush_dcache_page() can be ignored. There are two situations where I
> still see flush_dcache_page() useful:
> 
>      1. SMP systems where the cache maintenance operations aren't
>         automatically broadcast in hardware
>      2. The kernel modifies a page cache page that is already mapped in
>         user space
> 
> (1) can be worked around on some architectures (though not sure about
> all of them).
> 
> Is (2) a valid scenario?
> 
get_user_pages() ?
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