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 -----BEGIN PGP MESSAGE----- Version: GnuPG v1.4.14 (GNU/Linux) jA0EAwMCYq3dHqTzwcVgyRxC1j+oLxS8Yw92EIeKln+x3eAWzd7mM/pUluRo =0RYk -----END PGP MESSAGE----- On Friday, December 27, 2013 11:11 AM, Guibin(Bill) Tian <gbtian@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@gmail.com> 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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