On Tue, Dec 02, 2014 at 10:00:06AM +0000, David Laight wrote: > From: Jason Wang > > > On Mon, Dec 01, 2014 at 06:17:03PM +0800, Jason Wang wrote: > > >> Hello: > > >> > > >> We used to orphan packets before transmission for virtio-net. This > > >> breaks > > >> socket accounting and can lead serveral functions won't work, e.g: > > >> > > >> - Byte Queue Limit depends on tx completion nofication to work. > > >> - Packet Generator depends on tx completion nofication for the last > > >> transmitted packet to complete. > > >> - TCP Small Queue depends on proper accounting of sk_wmem_alloc to > > >> work. > > >> > > >> This series tries to solve the issue by enabling tx interrupts. To > > >> minize > > >> the performance impacts of this, several optimizations were used: > > >> > > >> - In guest side, virtqueue_enable_cb_delayed() was used to delay the tx > > >> interrupt untile 3/4 pending packets were sent. > > Doesn't that give problems for intermittent transmits? > > ... > > David >
No because it has not effect in that case. -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
