Re: [PATCH 2/3] mm: cma: introduce /proc/cmainfo

From: Laura Abbott
Date: Mon Dec 29 2014 - 16:11:32 EST

On 12/26/2014 6:39 AM, Stefan I. Strogin wrote:
/proc/cmainfo contains a list of currently allocated CMA buffers for every
CMA area when CONFIG_CMA_DEBUG is enabled.

Format is:

<base_phys_addr> - <end_phys_addr> (<size> kB), allocated by <PID>\
(<command name>), latency <allocation latency> us
<stack backtrace when the buffer had been allocated>

Signed-off-by: Stefan I. Strogin <s.strogin@xxxxxxxxxxxxxxxxxxx>
+static int __init proc_cmainfo_init(void)
+ proc_create("cmainfo", S_IRUSR, NULL, &proc_cmainfo_operations);
+ return 0;
+#endif /* CONFIG_CMA_DEBUG */

This seems better suited to debugfs over procfs, especially since the
option can be turned off. It would be helpful to break it
down by cma region as well to make it easier on systems with a lot
of regions.


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