Hi David, Thanks a lot for the inputs. Is there any way to ensure that page reference count get decremented properly before you free pages. Currenly i allocate a data page and use sendpage to pass the data to network layer and later on i free the page. It seems to me that on returning from sendpage the page reference count is not getting decremented. So when i try to free the page the page does not get freed resulting in a kind of memory leak. Please let me know if my undrstanding is not correct. kSanjay Just before freeing the page wh On 12/22/05, David S. Miller <davem@xxxxxxxxxxxxx> wrote: > From: Sanjay Kumar <coolsanjay@xxxxxxxxx> > Date: Thu, 22 Dec 2005 13:32:56 +0900 > > > On looking at the linux source code for kernel 2.6.14 i found out that > > in the following code a call is being made to "get_page" which > > increments the page reference count, but there is no corresponding > > "put_page" or other function which decrement the page count. > > It gets decremented when the SKB is freed via kfree_skb(). > See net/core/skbuff.c:skb_release_data(), invoked by kfree_skbmem(), > invoked by __kfree_skb(), invoked by kfree_skb(). > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
