From mboxrd@z Thu Jan 1 00:00:00 1970 From: sugnan.prabhu@gmail.com (sugnan prabhu) Date: Wed, 29 Dec 2010 10:06:04 +0530 Subject: strange behavior of sk_rmem_alloc In-Reply-To: References: Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Hello, The issue got resolved the skb references were not handled properly, now its working fine after correcting few handling. Thank you On Wed, Dec 29, 2010 at 9:34 AM, sugnan prabhu wrote: > > Hello all, > > I have written a network driver, address family and a protocol > family, when i create a socket in a user space program to my PF and AF, it > receives only first 300 packets and i see that all the packets are being > received till the function sk_recieve_skb() is called. > When i tried searching for the root of the cause, i found that *sk_rcvqueues_full(sk,skb) > *returns true after receiving 300 packets, further observing the cause i > found that the variable *sk_rmem_alloc* which is being checked in the > function in never getting decremented. > > > http://www.pubbs.net/200912/kernel/700-seeing-strange-values-for-tcp-skrmemalloc.html > > In > the above link i found that some one had similar problem, and as it says > calling *skb_copy_datagram_iovec()* should decrement the *sk_rmem_alloc*, > am even doing that. So can some suggest what can be the problem. One more > strange thing is *sk_queue_empty(&sk->receive_queue)* start returning true > after 300 packet. > > > --------------------------------------------------- > Thanking You, > Sugnan Prabhu S > http://sugnanprabhu.blogspot.com/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20101229/f16e14ac/attachment.html