> -----Original Message----- > From: Zhang, Xiao > Sent: Sunday, July 21, 2019 1:02 AM > To: dev@dpdk.org > Cc: Lu, Wenzhuo <wenzhuo...@intel.com>; Zhao1, Wei > <wei.zh...@intel.com>; Zhang, Qi Z <qi.z.zh...@intel.com>; Zhang, Xiao > <xiao.zh...@intel.com>; sta...@dpdk.org > Subject: [v2] 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 > > Cc: sta...@dpdk.org > > Signed-off-by: Xiao Zhang <xiao.zh...@intel.com>
Acked-by: Qi Zhang <qi.z.zh...@intel.com> Applied to dpdk-next-net-intel and v1 is reverted. Thanks Qi
