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    SubjectRe: [PATCH v3] MM: CMA: add a simple kernel module as the helper to test CMA
    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?


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