Re: [Qemu-devel] [PATCH v2] virtio-net: allow increasing rx queue size

2016-08-11 Thread Jason Wang
On 2016年08月11日 19:48, Cornelia Huck wrote: On Wed, 10 Aug 2016 17:47:16 +0300 "Michael S. Tsirkin" wrote: This allows increasing the rx queue size up to 1024: unlike with tx, guests don't put in huge S/G lists into RX so the risk of running into the max 1024 limitation due to some off-by-one

Re: [Qemu-devel] [PATCH v2] virtio-net: allow increasing rx queue size

2016-08-11 Thread Cornelia Huck
On Wed, 10 Aug 2016 17:47:16 +0300 "Michael S. Tsirkin" wrote: > This allows increasing the rx queue size up to 1024: unlike with tx, > guests don't put in huge S/G lists into RX so the risk of running into > the max 1024 limitation due to some off-by-one seems small. > > It's helpful for users

[Qemu-devel] [PATCH v2] virtio-net: allow increasing rx queue size

2016-08-10 Thread Michael S. Tsirkin
This allows increasing the rx queue size up to 1024: unlike with tx, guests don't put in huge S/G lists into RX so the risk of running into the max 1024 limitation due to some off-by-one seems small. It's helpful for users like OVS-DPDK which don't do any buffering on the host - 1K roughly matches