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author | Eliezer Tamir <eliezer.tamir@linux.intel.com> | 2013-06-24 07:28:03 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2013-06-25 23:35:52 (GMT) |
commit | 2d48d67fa8cd129ea85ea02d91b4a793286866f8 (patch) | |
tree | be47e2406605760d949b08d29d988d46c4a20799 /include/uapi/asm-generic/poll.h | |
parent | e4f2379db6c6823c5d4a4c2c912df00c65de51d7 (diff) | |
download | linux-fsl-qoriq-2d48d67fa8cd129ea85ea02d91b4a793286866f8.tar.xz |
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')
-rw-r--r-- | include/uapi/asm-generic/poll.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/poll.h b/include/uapi/asm-generic/poll.h index 9ce7f44..4aee586 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; |