> > -----Original Message----- > > From: Honnappa Nagarahalli <[email protected]> > > Sent: Monday, September 28, 2020 2:03 PM > > To: [email protected]; Honnappa Nagarahalli > <[email protected]>; > > Phil Yang <[email protected]>; [email protected]; > > [email protected] > > Cc: nd <[email protected]>; [email protected] > > Subject: [PATCH v2 1/8] net/memif: do not update local copy of tail in > > tx function > > > > In the case of S2M queues, the receiver synchronizes with the sender (i.e. > > informs of the packets it has received) using ring->tail. > > Hence, the sender does not need to update last_tail. > > > > In the case of M2S queues, the receiver uses last_tail to keep track > > of the descriptors it has received. The sender is not required to update the > last_tail. > > Updating the last_tail makes it a shared variable between the > > transmitter and receiver affecting the performance.
Hi Honnappa, The patch series is looking good. Reviewed-by: Jakub Grajciar <[email protected]>
