From 060212928670593fb89243640bf05cf89560b023 Mon Sep 17 00:00:00 2001 From: Eliezer Tamir Date: Mon, 10 Jun 2013 11:39:50 +0300 Subject: net: add low latency socket poll Adds an ndo_ll_poll method and the code that supports it. This method can be used by low latency applications to busy-poll Ethernet device queues directly from the socket code. sysctl_net_ll_poll controls how many microseconds to poll. Default is zero (disabled). Individual protocol support will be added by subsequent patches. Signed-off-by: Alexander Duyck Signed-off-by: Jesse Brandeburg Signed-off-by: Eliezer Tamir Acked-by: Eric Dumazet Tested-by: Willem de Bruijn Signed-off-by: David S. Miller --- net/socket.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index 3ebdcb805c51..21fd29f63ed2 100644 --- a/net/socket.c +++ b/net/socket.c @@ -104,6 +104,12 @@ #include #include #include +#include + +#ifdef CONFIG_NET_LL_RX_POLL +unsigned long sysctl_net_ll_poll __read_mostly; +EXPORT_SYMBOL_GPL(sysctl_net_ll_poll); +#endif static int sock_no_open(struct inode *irrelevant, struct file *dontcare); static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, -- cgit v1.2.3