Author: kp Date: Sat Jul 29 09:22:48 2017 New Revision: 321679 URL: https://svnweb.freebsd.org/changeset/base/321679
Log: vtnet: Support jumbo frames without TSO/GSO Currently in Virtio driver without TSO/GSO features enabled, the max scatter gather segments for the TX path can be 4, which limits the support for 9K JUMBO frames. 9K JUMBO frames results in more than 4 scatter gather segments and virtio driver fails to send the frame down to host OS. With TSO/GSO feature enabled max scatter gather segments can be 64, then 9K JUMBO frames are fine, this is making virtio driver to support JUMBO frames only with TSO/GSO. Increasing the VTNET_MIN_TX_SEGS which is the case for non TSO/GSO to 32 to support upto 64K JUMBO frames to Host. Submitted by: Lohith Bellad <lohith...@gmail.com> Reviewed by: adrian Differential Revision: https://reviews.freebsd.org/D8803 Modified: head/sys/dev/virtio/network/if_vtnetvar.h Modified: head/sys/dev/virtio/network/if_vtnetvar.h ============================================================================== --- head/sys/dev/virtio/network/if_vtnetvar.h Sat Jul 29 08:35:07 2017 (r321678) +++ head/sys/dev/virtio/network/if_vtnetvar.h Sat Jul 29 09:22:48 2017 (r321679) @@ -314,7 +314,7 @@ CTASSERT(sizeof(struct vtnet_mac_filter) <= PAGE_SIZE) #define VTNET_MRG_RX_SEGS 1 #define VTNET_MIN_RX_SEGS 2 #define VTNET_MAX_RX_SEGS 34 -#define VTNET_MIN_TX_SEGS 4 +#define VTNET_MIN_TX_SEGS 32 #define VTNET_MAX_TX_SEGS 64 /* _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
