sepherosa_gmail.com created this revision.
sepherosa_gmail.com added reviewers: network, adrian, delphij, royger,
decui_microsoft.com, honzhan_microsoft.com, howard0su_gmail.com.
sepherosa_gmail.com added a subscriber: freebsd-net-list.
REVISION SUMMARY
- TCP/IP stack will not do unnecessary IP header checksum for TSO packets
- Reduce guest load for non-TSO IP packets.
REVISION DETAIL
https://reviews.freebsd.org/D5099
AFFECTED FILES
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
CHANGE DETAILS
diff --git a/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
b/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
--- a/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
+++ b/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
@@ -172,7 +172,7 @@
* Windows releases.
*/
#define HN_CSUM_ASSIST_WIN8 (CSUM_TCP)
-#define HN_CSUM_ASSIST (CSUM_UDP | CSUM_TCP)
+#define HN_CSUM_ASSIST (CSUM_IP | CSUM_UDP | CSUM_TCP)
/* XXX move to netinet/tcp_lro.h */
#define HN_LRO_HIWAT_MAX 65535
@@ -867,6 +867,9 @@
rppi->per_packet_info_offset);
csum_info->xmit.is_ipv4 = 1;
+ if (m_head->m_pkthdr.csum_flags & CSUM_IP)
+ csum_info->xmit.ip_header_csum = 1;
+
if (m_head->m_pkthdr.csum_flags & CSUM_TCP) {
csum_info->xmit.tcp_csum = 1;
csum_info->xmit.tcp_header_offset = 0;
EMAIL PREFERENCES
https://reviews.freebsd.org/settings/panel/emailpreferences/
To: sepherosa_gmail.com, network, adrian, delphij, royger, decui_microsoft.com,
honzhan_microsoft.com, howard0su_gmail.com
Cc: freebsd-net-list
diff --git a/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c b/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
--- a/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
+++ b/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
@@ -172,7 +172,7 @@
* Windows releases.
*/
#define HN_CSUM_ASSIST_WIN8 (CSUM_TCP)
-#define HN_CSUM_ASSIST (CSUM_UDP | CSUM_TCP)
+#define HN_CSUM_ASSIST (CSUM_IP | CSUM_UDP | CSUM_TCP)
/* XXX move to netinet/tcp_lro.h */
#define HN_LRO_HIWAT_MAX 65535
@@ -867,6 +867,9 @@
rppi->per_packet_info_offset);
csum_info->xmit.is_ipv4 = 1;
+ if (m_head->m_pkthdr.csum_flags & CSUM_IP)
+ csum_info->xmit.ip_header_csum = 1;
+
if (m_head->m_pkthdr.csum_flags & CSUM_TCP) {
csum_info->xmit.tcp_csum = 1;
csum_info->xmit.tcp_header_offset = 0;
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