Hi,
I downloaded GIt kernel v2.6.23-davinci1 and brought it up on TIEVM6446.
When I run my video application multiple times I observe that the free
memory available in the system decreasing, suggesting a possible memory
leak in the Video capture driver.
I did the following experiments:
1. Experiment 1
a. Tested with the simple video capture test application that does
the following
i.
Open video capture device /dev/video0
ii.
Call the VIDIOC_REQBUFS ioctl to get 2 capture buffers
iii.
Close video capture device
iv.
Repeat the above three steps 1000 times
b. After running the above test application I saw that the systems
free memory was reduced (I used top to monitor the free memory while the
application was running)
2. Experiment 2
a. VIDIOC_REQB IOCTL code uses the __get_free_pages and the
free_reserved_pages kernel calls, suspecting them I tested with simple
test application that does the following
i.
Open a character device, in the open call we allocate 8K of memory using
__get_free_pages call
ii.
Close that charater device, in the close call we freed the 8K of memory
using free_ reserved_pages call.
iii.
Repeated the above two steps 1000 times
b. Here too we observed leak in the memory.
In my view it appears that the kernel calls get_free_pages and free_
reserved_pages are leaking small amount of memory each time.
It would be great and very helpful if any one could share similar
observations, let me know if there is any fix for this issue already
available or if am I missing anything in these experiments.
Happy New year and Best Regards,
Srinivasan S
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