Re: [PATCH v4] mm: cma: add a simple kernel module as the helper totest CMA

From: Barry Song
Date: Wed Jul 04 2012 - 02:56:38 EST

Hi Marek,

2012/7/4 Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>:
> Hello,
> On Tuesday, July 03, 2012 2:54 PM Michal Nazarewicz wrote:
>> > 2012/7/3 Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>:
>> >> IMHO the right place for such code is in drivers/misc instead of tools/cma.
>> >>
>> >> This patch contains a kernel module source code so it should be put with other kernel
>> >> modules. tools/ directory is aimed to contain user space code useful for developing and
>> >> testing Linux kernel.
>> On Tue, 03 Jul 2012 09:39:34 +0200, Barry Song <21cnbao@xxxxxxxxx> wrote:
>> > this one is aiming to test CMA, it should be in tools/ as Michal
>> > Nazarewicz and i have talked about that.
>> > it is not a real driver at all.
>> Yeah, I feel like it's better placed in tools/ not to pollute other directories with
>> drivers that are of no use to regular users. I don't have strong feelings about it
>> though, so I'm fine either way.
> Other test devices/drivers are in drivers directory (drivers/usb/misc/usbtest.c for
> example), I don't see any good reason for polluting tools/ directory with kernel code.
> IMHO the right person to decide if it makes sense to have such drivers in drivers/mics/
> or tools/cma/ is Greg KH. Barry, please resend it and ask Greg for the decision.

sure. thanks.

> Best regards
> --
> Marek Szyprowski
> Samsung Poland R&D Center

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