Re: [PATCH v3] MM: CMA: add a simple kernel module as the helper to test CMA
On 03/07/2012 12:49 PM, Barry Song wrote:
2012/3/7 Cong Wang<xiyou.wangcong@xxxxxxxxx>:On 03/07/2012 11:14 AM, Barry Song wrote:From: Barry Song<Baohua.Song@xxxxxxx> 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 requestAny 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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