path: root/include/uapi/asm-generic/poll.h
diff options
authorEliezer Tamir <eliezer.tamir@linux.intel.com>2013-06-24 10:28:03 +0300
committerDavid S. Miller <davem@davemloft.net>2013-06-25 16:35:52 -0700
commit2d48d67fa8cd129ea85ea02d91b4a793286866f8 (patch)
treebe47e2406605760d949b08d29d988d46c4a20799 /include/uapi/asm-generic/poll.h
parente4f2379db6c6823c5d4a4c2c912df00c65de51d7 (diff)
net: poll/select low latency socket support
select/poll busy-poll support. Split sysctl value into two separate ones, one for read and one for poll. updated Documentation/sysctl/net.txt Add a new poll flag POLL_LL. When this flag is set, sock_poll will call sk_poll_ll if possible. sock_poll sets this flag in its return value to indicate to select/poll when a socket that can busy poll is found. When poll/select have nothing to report, call the low-level sock_poll again until we are out of time or we find something. Once the system call finds something, it stops setting POLL_LL, so it can return the result to the user ASAP. Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/asm-generic/poll.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/poll.h b/include/uapi/asm-generic/poll.h
index 9ce7f44aebd2..4aee586979ca 100644
--- a/include/uapi/asm-generic/poll.h
+++ b/include/uapi/asm-generic/poll.h
@@ -30,6 +30,8 @@
#define POLLFREE 0x4000 /* currently only for epoll */
+#define POLL_LL 0x8000
struct pollfd {
int fd;
short events;

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