I malloc/free memory for elements of SIMPLEQ(3). In order to implement a 
non-blocking read/write to USB endpoints, read/write is done through 
read queue/write queue, and the queues are implemented using SIMPLEQ(3). 
An element of the queue is a pointer, whose address is allocated using 
the malloc/free.

Jaromir Dolecek wrote:
> On Mon, Feb 07, 2005 at 11:32:13AM +0900, Park Chan-youn wrote:
> 
>>It will be true, as you expects, that I'm doing some wrong 'freeing' - 
>>but it's not evident what is wrong, because vmstat(8) tells USB device 
>>does not have the allocated memory any longer after freeing the memory.
> 
> 
>>3)And again, could you tell me where can I find some good examples using 
>>  malloc(9) and free(9)?
> 
> 
> What do you use the malloc/free memory for? For some kind of DMA?
> Do you do the correct bus_dmamap_load/unload properly?
> 
> Jaromir