diff options
Diffstat (limited to 'drivers/net/hyperv/netvsc.c')
| -rw-r--r-- | drivers/net/hyperv/netvsc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 0a9d9feedc3f..06f39a99da7c 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -30,6 +30,7 @@ #include <linux/if_ether.h> #include <linux/vmalloc.h> #include <linux/rtnetlink.h> +#include <linux/prefetch.h> #include <asm/sync_bitops.h> @@ -1265,10 +1266,15 @@ int netvsc_poll(struct napi_struct *napi, int budget) void netvsc_channel_cb(void *context) { struct netvsc_channel *nvchan = context; + struct vmbus_channel *channel = nvchan->channel; + struct hv_ring_buffer_info *rbi = &channel->inbound; + + /* preload first vmpacket descriptor */ + prefetch(hv_get_ring_buffer(rbi) + rbi->priv_read_index); if (napi_schedule_prep(&nvchan->napi)) { /* disable interupts from host */ - hv_begin_read(&nvchan->channel->inbound); + hv_begin_read(rbi); __napi_schedule(&nvchan->napi); } |