Hi,
ip_queue_xmit will get called for every packet send, so frequent allocation and
free of memory can be a problem for slab allocator.
If you need only 48 bytes of memory in a function you can chose to use array.
-Anand Moon
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On Friday, December 27, 2013 11:11 AM, Guibin(Bill) Tian <[email protected]>
wrote:
It does work in your way, thanks Carson
On Thursday, December 26, 2013, Guibin(Bill) Tian wrote:
I tried it, still the same thing.
>Also, there is another side effect that if I call the two lines of code above,
>the internet connection seems to break except to localhost.
>
>
>
>On Thu, Dec 26, 2013 at 10:24 PM, bill4carson <[email protected]> wrote:
>
>
>>
>>On 2013年12月27日 11:16, Guibin(Bill) Tian wrote:
>>
>>Hi,
>>>I am doing a very simple operation at the method of ip_queue_xmit in
>>>ip_output.c.
>>>The code is very simple.
>>>
>>>char *p = kmalloc(48, GFP_KERNEL);
>>>
^^^^^^^^
>> GFP_ATOMIC ?
>>--
>>八百里秦川尘土飞扬,三千万老陕齐吼秦腔。
>>
>>--bill
>>
>
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