simple memory malloc and free in ip_output.c
moon.linux at yahoo.com
Fri Dec 27 02:02:15 EST 2013
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.
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On Friday, December 27, 2013 11:11 AM, Guibin(Bill) Tian <gbtian at gmail.com> 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 <bill4carson at gmail.com> wrote:
>>On 2013年12月27日 11:16, Guibin(Bill) Tian wrote:
>>>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 ?
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