From: xiyou.wangcong@gmail.com (Cong Wang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] MM: CMA: add a simple kernel module as the helper to test CMA
Date: Wed, 07 Mar 2012 12:14:36 +0800 [thread overview]
Message-ID: <4F56E0AC.8070501@gmail.com> (raw)
In-Reply-To: <1331090098-25097-1-git-send-email-Barry.Song@csr.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?
next prev parent reply other threads:[~2012-03-07 4:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-07 3:14 [PATCH v3] MM: CMA: add a simple kernel module as the helper to test CMA Barry Song
2012-03-07 4:14 ` Cong Wang [this message]
2012-03-07 4:49 ` Barry Song
2012-03-07 4:55 ` Cong Wang
2012-03-07 4:57 ` Barry Song
2012-03-07 5:01 ` Cong Wang
2012-03-07 5:05 ` Barry Song
2012-03-07 5:09 ` Cong Wang
2012-03-07 5:17 ` Barry Song
2012-03-07 5:22 ` Cong Wang
2012-03-07 5:40 ` Barry Song
2012-03-07 10:38 ` Barry Song
2012-03-07 10:48 ` Michal Nazarewicz
2012-03-07 10:55 ` Barry Song
2012-03-07 10:59 ` Michal Nazarewicz
2012-03-07 11:12 ` Barry Song
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