search for: vring_desc_f_wb

...fields in each descriptor of chain needs to write. TX buffer reclaiming can be the candidate, while RX side has to update 'len' at least. Even for this purpose, instead of writing out VRING_DESC_F_MORE on a few descriptors to suppress device writing back, it's cheaper to set flag (e.g. VRING_DESC_F_WB) on single descriptor of chain to hint the expected position for device to write back. - s/g chain: It makes sense to indicate the packet boundary. Considering in-order descriptor ring without VRING_DESC_F_INDIRECT, the next descriptor always belongs to the same s/g chain until end of packet indic...

This is an update from v1 version. Changes: - update event suppression mechanism - separate options for indirect and direct s/g - lots of new features --- Performance analysis of this is in my kvm forum 2016 presentation. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. * Descriptor ring: Guest adds descriptors with

This is an update from v1 version. Changes: - update event suppression mechanism - separate options for indirect and direct s/g - lots of new features --- Performance analysis of this is in my kvm forum 2016 presentation. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. * Descriptor ring: Guest adds descriptors with