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On Fri, Jun 04, 2010 at 10:28:56AM +0930, Rusty Russell wrote: > This patch is a subset of an already upstream patch, but this portion > is useful in earlier releases. > > Please consider for the 2.6.32 and 2.6.33 stable trees. > > If the add_buf operation fails, indicate failure to the caller. > > Signed-off-by: Bruce Rogers <brogers at novell.com> >

On Fri, Jun 04, 2010 at 10:28:56AM +0930, Rusty Russell wrote: > This patch is a subset of an already upstream patch, but this portion > is useful in earlier releases. > > Please consider for the 2.6.32 and 2.6.33 stable trees. > > If the add_buf operation fails, indicate failure to the caller. > > Signed-off-by: Bruce Rogers <brogers at novell.com> >

Hi Dave, Nice driver optimization from Shirley, but requires a new virtio hook. Do you want to take both? I have nothing else overlapping it. Cheers, Rusty.

Hi Dave, Nice driver optimization from Shirley, but requires a new virtio hook. Do you want to take both? I have nothing else overlapping it. Cheers, Rusty.

>From: Shirley Ma <mashirle at us.ibm.com> This adds experimental zero copy support in vhost-net, disabled by default. To enable, set experimental_zcopytx module option to 1. This patch maintains the outstanding userspace buffers in the sequence it is delivered to vhost. The outstanding userspace buffers will be marked...

>From: Shirley Ma <mashirle at us.ibm.com> This adds experimental zero copy support in vhost-net, disabled by default. To enable, set experimental_zcopytx module option to 1. This patch maintains the outstanding userspace buffers in the sequence it is delivered to vhost. The outstanding userspace buffers will be marked...

From: Shirley Ma <mashirle at us.ibm.com> This adds experimental zero copy support in vhost-net, disabled by default. To enable, set the zerocopytx module option to 1. This patch maintains the outstanding userspace buffers in the sequence it is delivered to vhost. The outstanding userspace buffers will be marked as don...

From: Shirley Ma <mashirle at us.ibm.com> This adds experimental zero copy support in vhost-net, disabled by default. To enable, set the zerocopytx module option to 1. This patch maintains the outstanding userspace buffers in the sequence it is delivered to vhost. The outstanding userspace buffers will be marked as don...

OK, here is the large patchset that implements the virtio spec update that I sent earlier (the spec itself needs a minor update, will send that out too next week, but I think we are on the same page here already). It supercedes the PUBLISH_USED_IDX patches I sent out earlier. What will follow will be a patchset that actually includes 4 sets of patches. I note below their status. Please consider

OK, here is the large patchset that implements the virtio spec update that I sent earlier (the spec itself needs a minor update, will send that out too next week, but I think we are on the same page here already). It supercedes the PUBLISH_USED_IDX patches I sent out earlier. What will follow will be a patchset that actually includes 4 sets of patches. I note below their status. Please consider

OK, here's a large patchset that implements the virtio spec update that I sent earlier. It supercedes the PUBLISH_USED_IDX patches I sent out earlier. I know it's a lot to ask but please test, and please consider for 2.6.40 :) I see nice performance improvements: one run showed going from 12 to 18 Gbit/s host to guest with netperf, but I did not spend a lot of time testing performance,

OK, here's a large patchset that implements the virtio spec update that I sent earlier. It supercedes the PUBLISH_USED_IDX patches I sent out earlier. I know it's a lot to ask but please test, and please consider for 2.6.40 :) I see nice performance improvements: one run showed going from 12 to 18 Gbit/s host to guest with netperf, but I did not spend a lot of time testing performance,

Hello all, Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_sec" disables this message. kjournald D 00000041 0 337 2 0x00000000 My test is totally being blocked. Thanks Shirley

Hello all, Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_sec" disables this message. kjournald D 00000041 0 337 2 0x00000000 My test is totally being blocked. Thanks Shirley

To even the latency, refill buffer right after being used. Sign-off-by: Shirley Ma <xma at us.ibm.com> --- diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0c7321c..c8201d4 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -429,6 +429,22 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp) return err; } +static bool

To even the latency, refill buffer right after being used. Sign-off-by: Shirley Ma <xma at us.ibm.com> --- diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0c7321c..c8201d4 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -429,6 +429,22 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp) return err; } +static bool