> -----Original Message----- > From: dev [mailto:[email protected]] On Behalf Of Xiao Zhang > Sent: Monday, July 8, 2019 9:37 PM > To: [email protected] > Cc: Lu, Wenzhuo <[email protected]>; Zhao1, Wei > <[email protected]>; Zhang, Xiao <[email protected]> > Subject: [dpdk-dev] [DPDK] net/e1000: fix buffer overrun while i219 > processing DMA transactions > > Intel® 100/200 Series Chipset platforms reduced the round-trip latency for the > LAN Controller DMA accesses, causing in some high performance cases a buffer > overrun while the I219 LAN Connected Device is processing the DMA > transactions. I219LM and I219V devices can fall into unrecovered Tx hang > under very stressfully UDP traffic and multiple reconnection of Ethernet > cable. > This Tx hang of the LAN Controller is only recovered if the system is > rebooted. > Slightly slow down DMA access by reducing the number of outstanding > requests. > This workaround could have an impact on TCP traffic performance on the > platform. Disabling TSO eliminates performance loss for TCP traffic without a > noticeable impact on CPU performance. > > Please, refer to I218/I219 specification update: > https://www.intel.com/content/www/us/en/embedded/products/networking > / > ethernet-connection-i218-family-documentation.html > > Signed-off-by: Xiao Zhang <[email protected]>
Acked-by: Qi Zhang <[email protected]> Applied to dpdk-next-net-intel. Thanks Qi
