[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 3/3] xen-netback: reintroduce guest Rx stall detection
On Wed, Oct 22, 2014 at 02:08:55PM +0100, David Vrabel wrote: > If a frontend not receiving packets it is useful to detect this and > turn off the carrier so packets are dropped early instead of being > queued and drained when they expire. > > A to-guest queue is stalled if it doesn't have enough free slots for a > an extended period of time (default 60 s). > > If at least one queue is stalled, the carrier is turned off (in the > expectation that the other queues will soon stall as well). The > carrier is only turned on once all queues are ready. > > When the frontend connects, all the queues start in the stalled state > and only become ready once the frontend queues enough Rx requests. > > Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx> Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx> _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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