Re: BUG? linux-mips flush_dcache_page

[Minchan Kim]

On Fri, Oct 16, 2009 at 6:24 PM, Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote:
> On Fri, Oct 16, 2009 at 02:17:19PM +0900, Minchan Kim wrote:
>
>> Many code of kernel fs usually allocate high page and flush.
>> But flush_dcache_page of mips checks PageHighMem to avoid flush
>> so that data consistency is broken, I think.
>
> What processor and cache configuration?

Chungki. Could you anwer this question ?

>> I found it's by you and Atsushi-san on 585fa724.
>> Why do we need the check?
>> Could you elaborte please?
>
> The if statement exists because __flush_dcache_page would crash if a page
> is not mapped.  This of course isn't correct but that wasn't a problem
> since highmem still is only supported on machines that don't have aliases.

Thansk for good explanation.
Chungki. Please let us know your machine(processor and cache configuration)

>
>  Ralf
>



-- 
Kind regards,
Minchan Kim
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