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authorEliezer Tamir <eliezer.tamir@linux.intel.com>2013-06-10 11:39:50 +0300
committerDavid S. Miller <davem@davemloft.net>2013-06-10 21:22:35 -0700
commit060212928670593fb89243640bf05cf89560b023 (patch)
tree32ae5c7be094983fb06430dbe09d36e2b317ca9c /net/socket.c
parentaf12fa6e46aa651e7b86a4c4117b562518fef184 (diff)
downloadlinux-060212928670593fb89243640bf05cf89560b023.tar.gz
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 <alexander.h.duyck@intel.com> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Tested-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c
index 3ebdcb805c5..21fd29f63ed 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -104,6 +104,12 @@
#include <linux/route.h>
#include <linux/sockios.h>
#include <linux/atalk.h>
+#include <net/ll_poll.h>
+
+#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,