Messages in this thread | | | Date | Wed, 07 Mar 2012 12:55:37 +0800 | From | Cong Wang <> | Subject | Re: [PATCH v3] MM: CMA: add a simple kernel module as the helper to test CMA |
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On 03/07/2012 12:49 PM, Barry Song wrote: > 2012/3/7 Cong Wang<xiyou.wangcong@gmail.com>: >> On 03/07/2012 11:14 AM, Barry Song wrote: >>> >>> From: Barry Song<Baohua.Song@csr.com> >>> >>> Any write request to /dev/cma_test will let the module to allocate memory >>> from >>> CMA, for example: >>> >>> 1st time >>> $ echo 1024> /dev/cma_test >>> will require cma_test to request 1MB(1024KB) >>> 2nd time >>> $ echo 2048> /dev/cma_test >>> will require cma_test to request 2MB(2048KB) >>> >>> Any read request to /dev/cma_test will let the module to free the 1st >>> valid >>> memory from CMA, for example: >>> >>> 1st time >>> $ cat /dev/cma_test >>> will require cma_test to free the 1MB allocated in the first write request >>> 2nd time >>> $ cat /dev/cma_test >>> will require cma_test to free the 2MB allocated in the second write >>> request >> >> >> Any reason why using /dev not /proc or /sys? > > pls note it is just a test module to verify CMA at runtime. it is not > important either it is /dev, it is /proc or it is /sys.
Why not important? You want it to be merged, don't you?
> > any way to make things easier, we take that way. >
Why /dev interface is easier than /proc and /sys? Confused, actually I think /proc or /sys should be easier...
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