Re: [PATCH v4 net-next] net: poll/select low latency socket support

From: David Miller
Date: Tue Jun 25 2013 - 19:36:19 EST


From: Eliezer Tamir <eliezer.tamir@xxxxxxxxxxxxxxx>
Date: Mon, 24 Jun 2013 10:28:03 +0300

> 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@xxxxxxxxxxxxxxx>

Looks good, applied, thanks!
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