'InKi Dae'; linux-media@vger.kernel.org;
linux-arm-ker...@lists.infradead.org;
> 'linux-fbdev'; kyungmin.p...@samsung.com
> Subject: Re: Memory sharing issue by application on V4L2 based device
driver
> with system mmu.
>
>
> .. snip..
> > But 64KB or 1MB ph
.. snip..
> But 64KB or 1MB physically contiguous memory is better than 4KB page in the
> point of performance.
Could you explain that in more details please? I presume you are
talking about a CPU that has a MMU unit, right?
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Michel Dänzer 쓴 글:
On Fre, 2011-01-07 at 11:17 +0900, InKi Dae wrote:
thank you for your comments.
your second comment has no any problem as I said before, user virtual
addess could be translated in page unit. but the problem, as you said,
is that when cpu access to the memory in user mode, the
On Fre, 2011-01-07 at 11:17 +0900, InKi Dae wrote:
> thank you for your comments.
>
> your second comment has no any problem as I said before, user virtual
> addess could be translated in page unit. but the problem, as you said,
> is that when cpu access to the memory in user mode, the memory
> a
; linux-arm-ker...@lists.infradead.org;
> linux-fbdev;
>> kyungmin.p...@samsung.com
>> Subject: Re: Memory sharing issue by application on V4L2 based device
> driver
>> with system mmu.
>>
>> thank you for your comments.
>>
>> your second comment ha
cator which can clear two main issues is needed.
> >
> > Best regards,
> >
> >> -----Original Message-
> >> From: linux-media-ow...@vger.kernel.org [mailto:linux-media-
> >> ow...@vger.kernel.org] On Behalf Of InKi Dae
> >> Sent: Thursday, J
@vger.kernel.org
>> Subject: Memory sharing issue by application on V4L2 based device driver
> with
>> system mmu.
>>
>> Hello, all.
>>
>> I'd like to discuss memory sharing issue by application on v4l2 based
> device driver
>> with system mmu and g
ilto:linux-media-
> ow...@vger.kernel.org] On Behalf Of InKi Dae
> Sent: Thursday, January 06, 2011 10:25 PM
> To: linux-media@vger.kernel.org
> Subject: Memory sharing issue by application on V4L2 based device driver
with
> system mmu.
>
> Hello, all.
>
> I'd like t
Hello, all.
I'd like to discuss memory sharing issue by application on v4l2 based
device driver with system mmu and get some advices about that.
Now I am working on Samsung SoC C210 platform and this platform has some
multimedia devices with system mmu such as fimc, and mfc also we
