On Fri, Jan 3, 2014 at 12:42 AM, Guibin(Bill) Tian <gbtian@xxxxxxxxx> wrote: > Thank you sirs. But in fact, I don't alloc/free for every packet. I did > exactly as what you said---reuse. > > I am a little confused why GFP_ATOMIC can work but GFP_KERNEL will cause the > system to panic. Does it because that GFP_KERNEL can sleep in kmalloc, then > ip_xmit_queue will be held or something? But anyway, GFP_ATOMIC works > perfectly. yup, you nailed it. gfp_kernel sleeps, while ip_xmit_queue is in interrupt context. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
